diff --git a/pom.xml b/pom.xml
index d5e1dc6..8a7e883 100644
--- a/pom.xml
+++ b/pom.xml
@@ -34,6 +34,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.security</groupId>
+            <artifactId>spring-security-crypto</artifactId>
+        </dependency>
         <!-- ***** -->
 
         <!-- LOGGER AND TEST DEPENDENCIES -->
diff --git a/src/main/java/database/DatabaseHelper.java b/src/main/java/database/DatabaseHelper.java
index d511d1d..fbf79c0 100644
--- a/src/main/java/database/DatabaseHelper.java
+++ b/src/main/java/database/DatabaseHelper.java
@@ -5,9 +5,10 @@ import com.j256.ormlite.support.ConnectionSource;
 
 public class DatabaseHelper {
     private static final String DATABASE_NAME = "monnethic";
-    private static final String DATABASE_USER = "";
-    private static final String DATABASE_PWD = "";
-    private final static String DATABASE_URL = "jdbc:postgresql://host:port/"+DATABASE_NAME;
+    private static final String DATABASE_USER = "postgres";
+    private static final String DATABASE_PWD = "L-*q~Ytaha{;u+7yJ8";
+    //private final static String DATABASE_URL = "jdbc:postgresql://host:port/"+DATABASE_NAME;
+    private final static String DATABASE_URL = "jdbc:postgresql://37.187.101.44:5432/"+DATABASE_NAME;
 
     public ConnectionSource setupDatabaseConnection(){
         try{
diff --git a/src/main/java/database/transaction/Transaction.java b/src/main/java/database/transaction/Transaction.java
index 85aa124..08769ee 100644
--- a/src/main/java/database/transaction/Transaction.java
+++ b/src/main/java/database/transaction/Transaction.java
@@ -4,38 +4,36 @@ import com.j256.ormlite.field.DatabaseField;
 import com.j256.ormlite.table.DatabaseTable;
 
 import java.math.BigInteger;
-import java.util.Date;
 
 @DatabaseTable(tableName = "T_TRANSACTION")
 public class Transaction {
-    @DatabaseField(columnName = "transactionId", generatedId = true, unique = true)
-    private int id;
-    @DatabaseField(columnName = "transactionDate")
-    private Date transactionDate;
-    @DatabaseField(columnName = "transactionDSrcAddress")
+    @DatabaseField
+    private int transactionId;
+    @DatabaseField(canBeNull = false)
+    private int userId;
+    @DatabaseField(canBeNull = false)
+    private long transactionDate;
+    @DatabaseField(columnName = "transactionFrom", canBeNull = false)
     private String sourceAddress;
-    @DatabaseField(columnName = "transactionDestAddress")
+    @DatabaseField(columnName = "transactionTo", canBeNull = false)
     private String destAddress;
-    @DatabaseField(columnName = "transactionHash")
+    @DatabaseField(canBeNull = false)
     private String transactionHash;
-    @DatabaseField(columnName = "transactionBlockNumber")
-    private String blockNumber;
-    @DatabaseField(columnName = "transactionAmout")
+    @DatabaseField(canBeNull = false)
     private BigInteger amount;
-    @DatabaseField(columnName = "transactionUnit")
+    @DatabaseField(canBeNull = false)
     private String unit;
 
     public Transaction() {
         super();
     }
 
-    public Transaction(Date transactionDate, String sourceAddress, String destAddress, String transactionHash, String blockNumber, BigInteger amount, String unit) {
+    public Transaction(long transactionDate, String sourceAddress, String destAddress, String transactionHash, BigInteger amount, String unit) {
         super();
         this.transactionDate = transactionDate;
         this.sourceAddress = sourceAddress;
         this.destAddress = destAddress;
         this.transactionHash = transactionHash;
-        this.blockNumber = blockNumber;
         this.amount = amount;
         this.unit = unit;
     }
@@ -72,19 +70,27 @@ public class Transaction {
         this.amount = amount;
     }
 
-    public int getId() {
-        return id;
+    public int getTransactionId() {
+        return transactionId;
     }
 
-    public void setId(int id) {
-        this.id = id;
+    public void setTransactionId(int id) {
+        this.transactionId = transactionId;
     }
 
-    public Date getTransactionDate() {
+    public int getUserId() {
+        return userId;
+    }
+
+    public void setUserId(int userId) {
+        this.userId = userId;
+    }
+
+    public long getTransactionDate() {
         return transactionDate;
     }
 
-    public void setTransactionDate(Date transactionDate) {
+    public void setTransactionDate(long transactionDate) {
         this.transactionDate = transactionDate;
     }
 
@@ -96,11 +102,4 @@ public class Transaction {
         this.unit = unit;
     }
 
-    public String getBlockNumber() {
-        return blockNumber;
-    }
-
-    public void setBlockNumber(String blockNumber) {
-        this.blockNumber = blockNumber;
-    }
 }
diff --git a/src/main/java/database/user/User.java b/src/main/java/database/user/User.java
index 851f2a3..2de0261 100644
--- a/src/main/java/database/user/User.java
+++ b/src/main/java/database/user/User.java
@@ -6,11 +6,13 @@ import com.j256.ormlite.table.DatabaseTable;
 //Class User which represent an User in the postgresDB
 @DatabaseTable(tableName = "T_USER")
 public class User {
+    @DatabaseField
+    private int userId;
     @DatabaseField(canBeNull = false)
     private String name;
     @DatabaseField(canBeNull = false)
     private String firstname;
-    @DatabaseField(id = true)
+    @DatabaseField(canBeNull = false)
     private String email;
     @DatabaseField(canBeNull = false)
     private String password;
@@ -22,6 +24,8 @@ public class User {
     private boolean verified;
     @DatabaseField(canBeNull = false)
     private boolean approved;
+    @DatabaseField(canBeNull = false)
+    private String user_hash;
 
     //Constructors
     //Default constructor for ORMLite
@@ -35,9 +39,10 @@ public class User {
         this.password = password;
     }
 
-    public User(String name, String firstname, String email, String password, long creation_date, long modification_date, boolean verified, boolean approved) {
+    public User(String name, String firstname,String user_hash, String email, String password, long creation_date, long modification_date, boolean verified, boolean approved) {
         this.name = name;
         this.firstname = firstname;
+        this.user_hash = user_hash;
         this.email = email;
         this.password = password;
         this.creation_date = creation_date;
@@ -48,10 +53,18 @@ public class User {
 
 
     //Getters and Setters
+    public int getUserId() {
+        return userId;
+    }
+
     public String getName() {
         return name;
     }
 
+    public void setUser_hash(String user_hash){this.user_hash = user_hash;}
+
+    public String getUser_hash(){return user_hash;}
+
     public void setName(String name) {
         this.name = name;
     }
diff --git a/src/main/java/database/user/UserDao.java b/src/main/java/database/user/UserDao.java
index 307b0eb..8d33285 100644
--- a/src/main/java/database/user/UserDao.java
+++ b/src/main/java/database/user/UserDao.java
@@ -14,7 +14,7 @@ public class UserDao {
     private DatabaseHelper dbh = new DatabaseHelper();
     private Dao<User, String> userDao;
 
-    public Dao createUserDaoConnection(){
+    private Dao createUserDaoConnection(){
         try {
             return DaoManager.createDao(dbh.setupDatabaseConnection(),User.class);
         }catch (Exception e){
diff --git a/src/main/java/restImplementation/DatabaseImplementation.java b/src/main/java/restImplementation/DatabaseImplementation.java
new file mode 100644
index 0000000..15f6ad4
--- /dev/null
+++ b/src/main/java/restImplementation/DatabaseImplementation.java
@@ -0,0 +1,66 @@
+package restImplementation;
+
+import database.user.User;
+import database.user.UserDao;
+import org.springframework.security.crypto.bcrypt.BCrypt;
+
+import java.time.Instant;
+
+public class DatabaseImplementation {
+
+    public boolean saveUser(User user){
+        UserDao userDao = new UserDao();
+        try{
+            User dbUser = userDao.getUser(user.getEmail());
+            if(dbUser != null){
+                return false;
+            }else {
+                user.setPassword(hashPassword(user.getPassword()));
+
+                long now = Instant.now().toEpochMilli();
+
+                user.setCreation_date(now);
+                user.setModification_date(now);
+                user.setVerified(true);
+                user.setApproved(true);
+
+                //TEMPORARY USER HASH IS
+                // name+email+password
+                user.setUser_hash(hashPassword(user.getName()+user.getEmail()+user.getPassword()));
+                userDao.addUser(user);
+            }
+
+        } catch (Exception e){
+            e.printStackTrace();
+        }
+        return true;
+    }
+
+    public String userLogger(User user){
+        UserDao userDao = new UserDao();
+        String response = "";
+        try{
+            User user1 = userDao.getUser(user.getEmail());
+            if(user1 != null){
+                String hash = user1.getPassword();
+
+                if(!BCrypt.checkpw(user.getPassword(), hash)){
+                    response = "NotAllowed";
+                }else{
+                    response = "Ok";
+                }
+            } else {
+                response = "NotExist";
+            }
+
+        } catch (Exception e){
+            System.out.println(e);
+        }
+        return response;
+    }
+
+
+    private String hashPassword(String plainTextPassword){
+        return BCrypt.hashpw(plainTextPassword,BCrypt.gensalt());
+    }
+}
diff --git a/src/main/java/restService/DatabaseController.java b/src/main/java/restService/DatabaseController.java
new file mode 100644
index 0000000..0e0c204
--- /dev/null
+++ b/src/main/java/restService/DatabaseController.java
@@ -0,0 +1,44 @@
+package restService;
+
+import database.user.User;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import restImplementation.DatabaseImplementation;
+
+import javax.validation.Valid;
+
+@RestController
+public class DatabaseController {
+
+    @PostMapping("/save")
+    @ResponseStatus(HttpStatus.CREATED)
+    public ResponseEntity<String> saveUser(@Valid @RequestBody User user){
+        DatabaseImplementation databaseImplementation = new DatabaseImplementation();
+        boolean result = databaseImplementation.saveUser(user);
+        if(result){
+            return ResponseEntity.status(HttpStatus.OK).body("");
+        }else {
+            return ResponseEntity.status(HttpStatus.FOUND).body("User exist");
+        }
+    }
+
+    @PostMapping("/login")
+    @ResponseStatus(HttpStatus.OK)
+    public ResponseEntity<String> login(@Valid @RequestBody User user){
+        DatabaseImplementation databaseImplementation = new DatabaseImplementation();
+        String response = databaseImplementation.userLogger(user);
+
+        if(response.equals("NotExist")){
+            return ResponseEntity.status(HttpStatus.NOT_FOUND).body("User not found");
+        }else if(response.equals("NotAllowed")){
+            return ResponseEntity.status(HttpStatus.FORBIDDEN).body("Wrong Password!");
+        } else if(response.equals("")){
+            return ResponseEntity.status(HttpStatus.NO_CONTENT).body("Error");
+        } else {
+            return ResponseEntity.ok("Welcome");
+        }
+    }
+
+
+}
diff --git a/src/test/java/crypto/CryptoTest.java b/src/test/java/crypto/CryptoTest.java
new file mode 100644
index 0000000..1451071
--- /dev/null
+++ b/src/test/java/crypto/CryptoTest.java
@@ -0,0 +1,23 @@
+package crypto;
+
+import org.junit.Ignore;
+import org.junit.Test;
+import org.springframework.security.crypto.bcrypt.BCrypt;
+
+import java.time.Instant;
+@Ignore
+public class CryptoTest {
+
+    @Test
+    public void testHash(){
+        String password = "newPassword";
+        System.out.println(hashPassword(password));
+
+        long now = Instant.now().toEpochMilli();
+        System.out.println(now);
+    }
+
+    private String hashPassword(String plainTextPassword) {
+        return BCrypt.hashpw(plainTextPassword, BCrypt.gensalt());
+    }
+}
diff --git a/src/test/java/database/DatabaseHelperTest.java b/src/test/java/database/DatabaseHelperTest.java
index 02dea81..07771d7 100644
--- a/src/test/java/database/DatabaseHelperTest.java
+++ b/src/test/java/database/DatabaseHelperTest.java
@@ -2,9 +2,11 @@ package database;
 
 import com.j256.ormlite.dao.Dao;
 import com.j256.ormlite.dao.DaoManager;
+import org.junit.Ignore;
 import org.junit.Test;
 
 //Testing class for postgresql connection
+@Ignore
 public class DatabaseHelperTest {
     private DatabaseHelper dbh = new DatabaseHelper();
 
diff --git a/src/test/java/restImplementation/UserLoggerTest.java b/src/test/java/restImplementation/UserLoggerTest.java
new file mode 100644
index 0000000..8f21cb6
--- /dev/null
+++ b/src/test/java/restImplementation/UserLoggerTest.java
@@ -0,0 +1,21 @@
+package restImplementation;
+
+import database.user.User;
+import org.junit.Ignore;
+import org.junit.Test;
+
+@Ignore
+public class UserLoggerTest {
+    @Test
+    public void testLoggerUser(){
+        User user = new User();
+        user.setPassword("newPassword");
+        user.setEmail("thomas.marshal@gmail.com");
+
+        DatabaseImplementation databaseImplementation = new DatabaseImplementation();
+        String res = databaseImplementation.userLogger(user);
+        System.out.println(res);
+
+
+    }
+}