bedder feedback on http response

Backend/Controllers/Group/SigningUp.php

@@ -24,8 +24,10 @@ if(isset($_POST['regGroup'])){
         $group->group_amount = $_POST['groupAmount'];
 
         if(!$group->save()){
-            return;
+            http_response_code(500);
+            exit();
         }
+
         $password = New Password();
 
         $password->group()->associate($group);
@@ -37,18 +39,20 @@ if(isset($_POST['regGroup'])){
         $password->remember_token = $token;
 
         if(!$password->save()){
-            echo http_response_code(500);
-        }else{
-            echo http_response_code(201);
+            http_response_code(500);
+            exit();
         }
 
         $_SESSION['groupName'] = $groupName;
         $_SESSION['token'] = $token;
         $_SESSION['success'] = "You are now logged in";
+        http_response_code(201);
+        echo json_encode(["message" => "you are login"]);
 
     }else{
-        echo http_response_code(400);
+        http_response_code(400);
+        echo json_encode(["message" => "password not valid"]);
     }
 }else{
-    echo http_response_code(400);
+    http_response_code(400);
 }