diff --git a/postman/MONNETHIC-API.postman_collection.json b/postman/MONNETHIC-API.postman_collection.json
new file mode 100644
index 0000000..8d89c73
--- /dev/null
+++ b/postman/MONNETHIC-API.postman_collection.json
@@ -0,0 +1,904 @@
+{
+	"info": {
+		"_postman_id": "fe2ac183-8378-4e3d-82c9-0cd1057d2fb7",
+		"name": "MONNETHIC-API",
+		"schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json"
+	},
+	"item": [
+		{
+			"name": "USER",
+			"item": [
+				{
+					"name": "CREATE",
+					"item": [
+						{
+							"name": "Register User",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"name\":\"Clara\",\n\t\"firstname\":\"Sophie\",\n\t\"email\":\"sophie.clara@gmail.com\",\n\t\"password\":\"sophieClara1234$\",\n\t\"association\":\"gonette\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/user/register",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"user",
+										"register"
+									]
+								},
+								"description": "Request to Register an User into Monnethic-Project (Blockchain and Database)"
+							},
+							"response": []
+						},
+						{
+							"name": "Register User To Delete",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"type": "text",
+										"value": "application/json"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"name\":\"Toto\",\n\t\"firstname\":\"tata\",\n\t\"email\":\"toto.tata@gmail.com\",\n\t\"password\":\"tototata1234$\",\n\t\"association\":\"gonette\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/user/register",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"user",
+										"register"
+									]
+								},
+								"description": "Request to Register an User into Monnethic-Project (Blockchain and Database)"
+							},
+							"response": []
+						},
+						{
+							"name": "Register User With Phone",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"type": "text",
+										"value": "application/json"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"name\":\"Meunier\",\n\t\"firstname\":\"Thomas\",\n\t\"email\":\"thomas.meunier@gmail.com\",\n\t\"password\":\"thomasMeunier4567$\",\n\t\"phone\":\"0102030405\",\n\t\"association\":\"gonette\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/user/register",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"user",
+										"register"
+									]
+								},
+								"description": "Request to Register an User into Monnethic-Project (Blockchain and Database)"
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				},
+				{
+					"name": "LOGIN",
+					"item": [
+						{
+							"name": "User-Login",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"email\":\"thomas.meunier@gmail.com\",\n\t\"password\":\"thomasPwd158$*\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/user/login",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"user",
+										"login"
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				},
+				{
+					"name": "GET",
+					"item": [
+						{
+							"name": "getUser",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"email\":\"toto.tata@gmail.com\",\n\t\"password\":\"tototata1234$\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/user/get",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"user",
+										"get"
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				},
+				{
+					"name": "DELETE",
+					"item": [
+						{
+							"name": "deleteUser",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"email\":\"toto.tata@gmail.com\",\n\t\"user_hash\":\"$2a$10$mE0RJq92SmedzuMlQvX29uXT9chqpKH/45cZ9GD7aphsMdJw9..sm\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/user/delete",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"user",
+										"delete"
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				},
+				{
+					"name": "APPROVE",
+					"item": [
+						{
+							"name": "approveUser",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"user_hash\":\"$2a$10$mE0RJq92SmedzuMlQvX29uXT9chqpKH/45cZ9GD7aphsMdJw9..sm\",\n\t\"email\":\"toto.tata@gmail.com\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/user/approve",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"user",
+										"approve"
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				}
+			],
+			"event": [
+				{
+					"listen": "prerequest",
+					"script": {
+						"id": "bddb7f7b-9a6f-4a71-8061-a3a1fe46fb12",
+						"type": "text/javascript",
+						"exec": [
+							""
+						]
+					}
+				},
+				{
+					"listen": "test",
+					"script": {
+						"id": "add34646-7177-4d4f-ad9e-b3eb963d5bf8",
+						"type": "text/javascript",
+						"exec": [
+							""
+						]
+					}
+				}
+			]
+		},
+		{
+			"name": "WALLET",
+			"item": [
+				{
+					"name": "GET",
+					"item": [
+						{
+							"name": "getWallet",
+							"request": {
+								"method": "GET",
+								"header": [],
+								"body": {
+									"mode": "raw",
+									"raw": ""
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/wallet/getWallet?walletHash=$2a$10$8PJyraUjMoL/h.cQjJyMZedBUlcTjPjNm4j1NuqzQBTnSe2XNuGM2",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"wallet",
+										"getWallet"
+									],
+									"query": [
+										{
+											"key": "walletHash",
+											"value": "$2a$10$8PJyraUjMoL/h.cQjJyMZedBUlcTjPjNm4j1NuqzQBTnSe2XNuGM2"
+										}
+									]
+								}
+							},
+							"response": []
+						},
+						{
+							"name": "getUserWallets",
+							"request": {
+								"method": "GET",
+								"header": [],
+								"body": {
+									"mode": "raw",
+									"raw": ""
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/wallet/getUserWallets?userHash=$2a$10$GzyMhD3n05Z2lwCnoGi2dusjKrNAmHhtn5fw1xLpes5.cEV5T7lve",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"wallet",
+										"getUserWallets"
+									],
+									"query": [
+										{
+											"key": "userHash",
+											"value": "$2a$10$GzyMhD3n05Z2lwCnoGi2dusjKrNAmHhtn5fw1xLpes5.cEV5T7lve"
+										}
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				},
+				{
+					"name": "DELETE",
+					"item": [
+						{
+							"name": "deleteWallet",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"userHash\":\"\",\n\t\"walletHash\":\"$2a$10$GzyMhD3n05Z2lwCnoGi2dusjKrNAmHhtn5fw1xLpes5.cEV5T7lve\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/wallet/delete",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"wallet",
+										"delete"
+									],
+									"query": [
+										{
+											"key": "",
+											"value": "",
+											"disabled": true
+										}
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				},
+				{
+					"name": "CREATE",
+					"item": [
+						{
+							"name": "createWallet",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"type\":\"test\",\n\t\"user_hash\":\"$2a$10$GzyMhD3n05Z2lwCnoGi2dusjKrNAmHhtn5fw1xLpes5.cEV5T7lve\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/wallet/create",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"wallet",
+										"create"
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				},
+				{
+					"name": "SETBALANCE",
+					"item": [
+						{
+							"name": "setBalance",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"association_hash\":\"$2a$10$lPl7xCdsp.2g9fX7ytj9tONkV3PuQzG.9A9G8PfEKnIkT2KpahMme\",\n\t\"assocation_pwd\":\"asso_GonE8977&4$*-\",\n\t\"wallet_hash\":\"$2a$10$8PJyraUjMoL/h.cQjJyMZedBUlcTjPjNm4j1NuqzQBTnSe2XNuGM2\",\n\t\"amount\":1.0\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/wallet/setBalance",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"wallet",
+										"setBalance"
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				},
+				{
+					"name": "TRANSFER",
+					"item": [
+						{
+							"name": "transferWallet",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"user_hash\":\"$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0.\",\n\t\"wallet_hash\":\"$2a$10$8PJyraUjMoL/h.cQjJyMZedBUlcTjPjNm4j1NuqzQBTnSe2XNuGM2\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/wallet/transfer",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"wallet",
+										"transfer"
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				}
+			]
+		},
+		{
+			"name": "TRANSACTION",
+			"item": [
+				{
+					"name": "SEND",
+					"item": [
+						{
+							"name": "sendTransaction",
+							"request": {
+								"method": "POST",
+								"header": [
+									{
+										"key": "Content-Type",
+										"name": "Content-Type",
+										"value": "application/json",
+										"type": "text"
+									}
+								],
+								"body": {
+									"mode": "raw",
+									"raw": "{\n\t\"source_user_hash\":\"$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0.\",\n\t\"source_user_pwd\":\"thomasPwd158$*\",\n\t\"transaction_from\":\"$2a$10$6Z4uNeOgAKhpWYGVYwPWhe6G91lIKHOCA2yYcpzS1pbJyosNNw3Gu\",\n\t\"transaction_to\":\"$2a$10$UKiTo/eqpnvlny3U5xpJ../C2WOgoxebAl3xiexAhinC8X7Jt2wY.\",\n\t\"transaction_amount\":1.0,\n\t\"transaction_unit\":\"gonette\"\n}"
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/transaction/send",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"transaction",
+										"send"
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				},
+				{
+					"name": "GET",
+					"item": [
+						{
+							"name": "SENT",
+							"item": [
+								{
+									"name": "getSent",
+									"request": {
+										"method": "GET",
+										"header": [],
+										"body": {
+											"mode": "raw",
+											"raw": ""
+										},
+										"url": {
+											"raw": "http://localhost:10053/api/rest/transaction/get/sent?wallet_hash=$2a$10$6Z4uNeOgAKhpWYGVYwPWhe6G91lIKHOCA2yYcpzS1pbJyosNNw3Gu",
+											"protocol": "http",
+											"host": [
+												"localhost"
+											],
+											"port": "10053",
+											"path": [
+												"api",
+												"rest",
+												"transaction",
+												"get",
+												"sent"
+											],
+											"query": [
+												{
+													"key": "wallet_hash",
+													"value": "$2a$10$6Z4uNeOgAKhpWYGVYwPWhe6G91lIKHOCA2yYcpzS1pbJyosNNw3Gu"
+												}
+											]
+										}
+									},
+									"response": []
+								},
+								{
+									"name": "getAllSent",
+									"request": {
+										"method": "GET",
+										"header": [],
+										"body": {
+											"mode": "raw",
+											"raw": ""
+										},
+										"url": {
+											"raw": "http://localhost:10053/api/rest/transaction/get/allSent?user_hash=$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0.",
+											"protocol": "http",
+											"host": [
+												"localhost"
+											],
+											"port": "10053",
+											"path": [
+												"api",
+												"rest",
+												"transaction",
+												"get",
+												"allSent"
+											],
+											"query": [
+												{
+													"key": "user_hash",
+													"value": "$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0."
+												}
+											]
+										}
+									},
+									"response": []
+								}
+							],
+							"_postman_isSubFolder": true
+						},
+						{
+							"name": "RECEIVED",
+							"item": [
+								{
+									"name": "getAllReceived",
+									"request": {
+										"method": "GET",
+										"header": [],
+										"body": {
+											"mode": "raw",
+											"raw": ""
+										},
+										"url": {
+											"raw": "http://localhost:10053/api/rest/transaction/get/allReceived?user_hash=$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0.",
+											"protocol": "http",
+											"host": [
+												"localhost"
+											],
+											"port": "10053",
+											"path": [
+												"api",
+												"rest",
+												"transaction",
+												"get",
+												"allReceived"
+											],
+											"query": [
+												{
+													"key": "user_hash",
+													"value": "$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0."
+												}
+											]
+										}
+									},
+									"response": []
+								},
+								{
+									"name": "getReceived",
+									"request": {
+										"method": "GET",
+										"header": [],
+										"body": {
+											"mode": "raw",
+											"raw": ""
+										},
+										"url": {
+											"raw": "http://localhost:10053/api/rest/transaction/get/received?wallet_hash=$2a$10$6Z4uNeOgAKhpWYGVYwPWhe6G91lIKHOCA2yYcpzS1pbJyosNNw3Gu",
+											"protocol": "http",
+											"host": [
+												"localhost"
+											],
+											"port": "10053",
+											"path": [
+												"api",
+												"rest",
+												"transaction",
+												"get",
+												"received"
+											],
+											"query": [
+												{
+													"key": "wallet_hash",
+													"value": "$2a$10$6Z4uNeOgAKhpWYGVYwPWhe6G91lIKHOCA2yYcpzS1pbJyosNNw3Gu"
+												}
+											]
+										}
+									},
+									"response": []
+								}
+							],
+							"_postman_isSubFolder": true
+						},
+						{
+							"name": "getLatest",
+							"request": {
+								"method": "GET",
+								"header": [],
+								"body": {
+									"mode": "raw",
+									"raw": ""
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/transaction/get/latest?user_hash=$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0.",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"transaction",
+										"get",
+										"latest"
+									],
+									"query": [
+										{
+											"key": "user_hash",
+											"value": "$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0."
+										}
+									]
+								}
+							},
+							"response": []
+						},
+						{
+							"name": "getTransaction",
+							"request": {
+								"method": "GET",
+								"header": [],
+								"body": {
+									"mode": "raw",
+									"raw": ""
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/transaction/get?wallet_hash=$2a$10$UKiTo/eqpnvlny3U5xpJ../C2WOgoxebAl3xiexAhinC8X7Jt2wY.&txID=ce65025ddddcb26f6b380d54cf9d9b090550cbacadfb63b062f9336a72eeb6bc",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"transaction",
+										"get"
+									],
+									"query": [
+										{
+											"key": "wallet_hash",
+											"value": "$2a$10$UKiTo/eqpnvlny3U5xpJ../C2WOgoxebAl3xiexAhinC8X7Jt2wY."
+										},
+										{
+											"key": "txID",
+											"value": "ce65025ddddcb26f6b380d54cf9d9b090550cbacadfb63b062f9336a72eeb6bc"
+										}
+									]
+								}
+							},
+							"response": []
+						},
+						{
+							"name": "getAll",
+							"request": {
+								"method": "GET",
+								"header": [],
+								"body": {
+									"mode": "raw",
+									"raw": ""
+								},
+								"url": {
+									"raw": "http://localhost:10053/api/rest/transaction/getAll?user_hash=$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0.",
+									"protocol": "http",
+									"host": [
+										"localhost"
+									],
+									"port": "10053",
+									"path": [
+										"api",
+										"rest",
+										"transaction",
+										"getAll"
+									],
+									"query": [
+										{
+											"key": "user_hash",
+											"value": "$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0."
+										}
+									]
+								}
+							},
+							"response": []
+						}
+					],
+					"_postman_isSubFolder": true
+				}
+			]
+		},
+		{
+			"name": "SESSION",
+			"item": [
+				{
+					"name": "sessiontStart",
+					"request": {
+						"method": "POST",
+						"header": [
+							{
+								"key": "Content-Type",
+								"name": "Content-Type",
+								"value": "application/json",
+								"type": "text"
+							}
+						],
+						"body": {
+							"mode": "raw",
+							"raw": "{\n\t\"user_hash\":\"$2a$10$J7B8sXULfiPfnlKRlTjqQuSrbumTyv.acB8NpxDrUQ3WmnfKdjx0.\",\n\t\"user_email\":\"thomas.meunier@gmail.com\"\n}"
+						},
+						"url": {
+							"raw": "http://localhost:10053/api/rest/session/start",
+							"protocol": "http",
+							"host": [
+								"localhost"
+							],
+							"port": "10053",
+							"path": [
+								"api",
+								"rest",
+								"session",
+								"start"
+							]
+						}
+					},
+					"response": []
+				},
+				{
+					"name": "sessionEnd",
+					"request": {
+						"method": "POST",
+						"header": [
+							{
+								"key": "Content-Type",
+								"name": "Content-Type",
+								"value": "application/json",
+								"type": "text"
+							}
+						],
+						"body": {
+							"mode": "raw",
+							"raw": "{\n\t\"session_id\":1\n}"
+						},
+						"url": {
+							"raw": "http://localhost:10053/api/rest/session/end",
+							"protocol": "http",
+							"host": [
+								"localhost"
+							],
+							"port": "10053",
+							"path": [
+								"api",
+								"rest",
+								"session",
+								"end"
+							]
+						}
+					},
+					"response": []
+				}
+			]
+		}
+	]
+}
\ No newline at end of file
diff --git a/src/main/java/restImplementation/SessionImplementation.java b/src/main/java/restImplementation/SessionImplementation.java
index 607ff63..bb12ce0 100644
--- a/src/main/java/restImplementation/SessionImplementation.java
+++ b/src/main/java/restImplementation/SessionImplementation.java
@@ -7,10 +7,10 @@ import java.time.Instant;
 
 public class SessionImplementation {
 
-    public int startSession(String userHash, String userEmail) throws  Exception {
+    public int startSession(String user_hash, String user_email) throws  Exception {
         SessionDao sessionDao = new SessionDao();
         UserImplementation userImplementation = new UserImplementation();
-        int userId = userImplementation.getUserId(userHash,userEmail);
+        int userId = userImplementation.getUserId(user_hash,user_email);
 
         Session session = new Session();
         session.setUser_id(userId);
@@ -20,8 +20,8 @@ public class SessionImplementation {
         return sessionDao.setStartSession(session);
     }
 
-    public void endSession(int sessionId) throws Exception {
+    public void endSession(int session_id) throws Exception {
         SessionDao sessionDao = new SessionDao();
-        sessionDao.setEndSession(sessionId);
+        sessionDao.setEndSession(session_id);
     }
 }
diff --git a/src/main/java/restImplementation/UserImplementation.java b/src/main/java/restImplementation/UserImplementation.java
index 206308b..139c7be 100644
--- a/src/main/java/restImplementation/UserImplementation.java
+++ b/src/main/java/restImplementation/UserImplementation.java
@@ -6,7 +6,6 @@ import database.user.UserDao;
 import org.apache.log4j.BasicConfigurator;
 import org.apache.log4j.Logger;
 import org.springframework.security.crypto.bcrypt.BCrypt;
-import restService.UserResource;
 
 import java.time.Instant;
 import java.util.HashMap;
@@ -85,9 +84,9 @@ public class UserImplementation {
         }
     }
 
-    public int getUserId(String userHash, String userEmail) throws Exception{
+    public int getUserId(String user_hash, String user_email) throws Exception{
         UserDao userDao = new UserDao();
-        return userDao.getUserIdWithHashAndEmail(userHash,userEmail);
+        return userDao.getUserIdWithHashAndEmail(user_hash,user_email);
     }
 
 
diff --git a/src/main/java/restService/SessionResource.java b/src/main/java/restService/SessionResource.java
index f94f8a0..67cb6cd 100644
--- a/src/main/java/restService/SessionResource.java
+++ b/src/main/java/restService/SessionResource.java
@@ -5,29 +5,34 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 import restImplementation.SessionImplementation;
 
+import java.util.Map;
+
 @RestController
 @RequestMapping(value = "/api/rest/session")
 public class SessionResource {
 
-    @RequestMapping(value = "/start", method = RequestMethod.GET, params = {"userHash","userEmail"}, produces = "application/json")
+    @RequestMapping(value = "/start", method = RequestMethod.POST, produces = "application/json")
     @ResponseStatus(HttpStatus.CREATED)
-    public ResponseEntity startSession(@RequestParam(value = "userHash") String userHash, @RequestParam(value = "userEmail") String userEmail){
+    public ResponseEntity startSession(@RequestBody Map<String,String> requestParam){
         SessionImplementation sessionImplementation = new SessionImplementation();
         try {
-            int session_id = sessionImplementation.startSession(userHash,userEmail);
-            return ResponseEntity.status(HttpStatus.OK).body("{\"sessionId\":"+session_id+"}");
+            String user_hash = requestParam.get("user_hash");
+            String user_email = requestParam.get("user_email");
+            int session_id = sessionImplementation.startSession(user_hash,user_email);
+            return ResponseEntity.status(HttpStatus.OK).body("{\"session_id\":"+session_id+"}");
         } catch (Exception e){
             StringResponse responseS = new StringResponse(e.getMessage());
             return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(responseS);
         }
     }
 
-    @RequestMapping(value = "/end", method = RequestMethod.GET, params = {"userId"}, produces = "application/json")
+    @RequestMapping(value = "/end", method = RequestMethod.POST, produces = "application/json")
     @ResponseStatus(HttpStatus.OK)
-    public ResponseEntity endSession(@RequestParam(value = "userId") int userId){
+    public ResponseEntity endSession(@RequestBody Map<String,Integer> requestParam){
         SessionImplementation sessionImplementation = new SessionImplementation();
         try {
-            sessionImplementation.endSession(userId);
+            int session_id = requestParam.get("session_id");
+            sessionImplementation.endSession(session_id);
             return ResponseEntity.status(HttpStatus.OK).body("");
         } catch (Exception e){
             StringResponse responseS = new StringResponse(e.getMessage());