Refactor authentication logic to unify user account handling and update database schema for user accounts

src/main/java/com/gameplatform/server/controller/UserController.java

@@ -10,7 +10,7 @@ import reactor.core.publisher.Mono;
 
 @RestController
 @RequestMapping("/api/users")
-public class UserController {
+public class    UserController {
     private final UserService userService;
 
     public UserController(UserService userService) {

src/main/java/com/gameplatform/server/controller/auth/AuthController.java

@@ -40,9 +40,8 @@ public class AuthController {
             put("userType", c.get("userType"));
             put("userId", c.get("userId"));
             put("username", c.get("username"));
-            put("role", c.get("role"));
+            if ("admin".equals(c.get("userType"))) put("role", c.get("role"));
             put("exp", c.getExpiration());
         }};
     }
 }
-