Implemented service, repository and controller for each entity

src/main/java/com/faf223/expensetrackerfaf/controller/UserController.java

@@ -0,0 +1,29 @@
+package com.faf223.expensetrackerfaf.controller;
+
+import com.faf223.expensetrackerfaf.model.User;
+import com.faf223.expensetrackerfaf.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/users")
+public class UserController {
+
+    @Autowired
+    private UserService userService;
+
+    @GetMapping("/{userUuid}")
+    public ResponseEntity<User> getUser(@PathVariable String userUuid) {
+        User user = userService.getUserById(userUuid);
+        if (user != null) {
+            return ResponseEntity.ok(user);
+        } else {
+            return ResponseEntity.notFound().build();
+        }
+    }
+}
+