Add sample user controller with sign-up and name of current user

backend/src/main/java/de/hft/geotime/security/SecurityConstants.java

@@ -5,5 +5,5 @@ public class SecurityConstants {
     public static final long EXPIRATION_TIME = 864_000_000; // 10 days
     public static final String TOKEN_PREFIX = "Bearer ";
     public static final String HEADER_STRING = "Authorization";
-    public static final String SIGN_UP_URL = "/users/sign-up";
+    public static final String SIGN_UP_URL = "/user/sign-up";
 }

backend/src/main/java/de/hft/geotime/user/UserController.java

@@ -0,0 +1,35 @@
+package de.hft.geotime.user;
+
+import org.springframework.security.core.Authentication;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.HashMap;
+
+@RestController
+@RequestMapping("/user")
+public class UserController {
+
+    private TimetrackUserRepository userRepository;
+    private BCryptPasswordEncoder bCryptPasswordEncoder;
+
+    public UserController(TimetrackUserRepository userRepository, BCryptPasswordEncoder bCryptPasswordEncoder) {
+        this.userRepository = userRepository;
+        this.bCryptPasswordEncoder = bCryptPasswordEncoder;
+    }
+
+    @GetMapping
+    public String getUsername(Authentication authentication) {
+        TimetrackUser timetrackUser = userRepository.findFirstByUsername(authentication.getName());
+        return "Welcome back " + timetrackUser.getFirstname() + " " + timetrackUser.getLastname();
+    }
+
+    // TODO: implement register, maybe move to another class
+    @PostMapping("/sign-up")
+    public HashMap<String, Object> signUp(@RequestBody HashMap<String, Object> payload) {
+        return payload;
+        // user.setPassword(bCryptPasswordEncoder.encode(user.getPassword()));
+        // userRepository.save(user);
+    }
+
+}