diff --git a/backend/src/main/java/de/hft/geotime/controllers/UserController.java b/backend/src/main/java/de/hft/geotime/controllers/UserController.java
index e1cd793..e5acae4 100644
--- a/backend/src/main/java/de/hft/geotime/controllers/UserController.java
+++ b/backend/src/main/java/de/hft/geotime/controllers/UserController.java
@@ -13,6 +13,8 @@ import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.util.HashMap;
+
 @RestController
 public class UserController {
 
@@ -29,15 +31,31 @@ public class UserController {
     @GetMapping("/whoami")
     public UserAllEmbeddedProjection getUsername(Authentication authentication) {
         TimetrackUser user = userRepository.findFirstByUsername(authentication.getName());
-        return projectionFactory.createProjection(UserAllEmbeddedProjection.class, user);
+        if (user != null) {
+            return projectionFactory.createProjection(UserAllEmbeddedProjection.class, user);
+        } else {
+            return null;
+        }
     }
 
     @PostMapping("/sign-up")
-    public ResponseEntity<String> signUp(@RequestBody TimetrackUser user) {
-        user.setPassword(bCryptPasswordEncoder.encode(user.getPassword()));
-        TimetrackUser byUsername = userRepository.findFirstByUsername(user.getUsername());
+    public ResponseEntity<String> signUp(@RequestBody HashMap<String, String> signUpData) {
+        if (signUpData.get("username") == null
+                || signUpData.get("password") == null
+                || signUpData.get("firstname") == null
+                || signUpData.get("lastname") == null) {
+            return new ResponseEntity<>("Missing information", HttpStatus.BAD_REQUEST);
+        }
+
+        TimetrackUser newUser = new TimetrackUser();
+        newUser.setFirstname(signUpData.get("firstname"));
+        newUser.setLastname(signUpData.get("lastname"));
+        newUser.setPassword(bCryptPasswordEncoder.encode(signUpData.get("password")));
+        newUser.setUsername(signUpData.get("username"));
+
+        TimetrackUser byUsername = userRepository.findFirstByUsername(newUser.getUsername());
         if (byUsername == null) {
-            userRepository.save(user);
+            userRepository.save(newUser);
             return new ResponseEntity<>("Created", HttpStatus.CREATED);
         } else {
             return new ResponseEntity<>("Username already exists!", HttpStatus.CONFLICT);
diff --git a/backend/src/main/java/de/hft/geotime/security/JWTAuthenticationFilter.java b/backend/src/main/java/de/hft/geotime/security/JWTAuthenticationFilter.java
index 7ca7442..e63aa7d 100644
--- a/backend/src/main/java/de/hft/geotime/security/JWTAuthenticationFilter.java
+++ b/backend/src/main/java/de/hft/geotime/security/JWTAuthenticationFilter.java
@@ -15,6 +15,7 @@ import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Date;
+import java.util.HashMap;
 
 import static com.auth0.jwt.algorithms.Algorithm.HMAC512;
 import static de.hft.geotime.security.SecurityConstants.*;
@@ -31,11 +32,11 @@ public class JWTAuthenticationFilter extends UsernamePasswordAuthenticationFilte
             HttpServletRequest req,
             HttpServletResponse res) throws AuthenticationException {
         try {
-            LoginUser creds = new ObjectMapper().readValue(req.getInputStream(), LoginUser.class);
+            HashMap creds = new ObjectMapper().readValue(req.getInputStream(), HashMap.class);
             return authenticationManager.authenticate(
                     new UsernamePasswordAuthenticationToken(
-                            creds.getUsername(),
-                            creds.getPassword(),
+                            creds.get("username"),
+                            creds.get("password"),
                             new ArrayList<>()
                     )
             );
diff --git a/backend/src/main/resources/application-dev.properties b/backend/src/main/resources/application-dev.properties
index 4497ed1..d1af305 100644
--- a/backend/src/main/resources/application-dev.properties
+++ b/backend/src/main/resources/application-dev.properties
@@ -4,4 +4,5 @@ spring.datasource.username=sa
 spring.datasource.password=
 spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
 spring.h2.console.enabled=true
+spring.datasource.initialization-mode=always
 spring.h2.console.path=/h2-console
\ No newline at end of file
diff --git a/backend/src/main/resources/application-prod.properties b/backend/src/main/resources/application-prod.properties
index 2ed9234..63f56f2 100644
--- a/backend/src/main/resources/application-prod.properties
+++ b/backend/src/main/resources/application-prod.properties
@@ -2,5 +2,4 @@ spring.jpa.hibernate.ddl-auto=update
 spring.datasource.url=jdbc:mariadb://db:3306/geotime
 spring.datasource.username=root
 spring.datasource.password=supersecure
-spring.datasource.initialization-mode=always
 spring.datasource.driver-class-name=org.mariadb.jdbc.Driver
\ No newline at end of file
diff --git a/backend/src/main/resources/data.sql b/backend/src/main/resources/data.sql
index 49f0053..3f9bdf3 100644
--- a/backend/src/main/resources/data.sql
+++ b/backend/src/main/resources/data.sql
@@ -1,7 +1,9 @@
 SET FOREIGN_KEY_CHECKS=0;
 
-DELETE FROM timetrack_user;
 DELETE FROM role;
+DELETE FROM location;
+DELETE FROM timetrack_user;
+DELETE FROM timetrack_account;
 
 INSERT INTO role (id, `name`) VALUES
   (1, 'Admin');
diff --git a/docker-compose.yml b/docker-compose.yml
index ccd86b9..e5daad0 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -12,6 +12,7 @@ services:
 
   backend:
     container_name: qbc_backend
+    restart: always
     build:
       context: ./backend
     ports:
@@ -25,7 +26,10 @@ services:
     build: 
       context: ./sql
     volumes: 
-      - "./sql/db-data:/var/lib/mysql"
+      - "qbc-db-data:/var/lib/mysql"
     environment:
       MYSQL_DATABASE: geotime
-      MYSQL_ROOT_PASSWORD: supersecure
\ No newline at end of file
+      MYSQL_ROOT_PASSWORD: supersecure
+
+volumes:
+  qbc-db-data:
\ No newline at end of file