diff --git a/Backend/Controllers/Admin/AdminLogin.php b/Backend/Controllers/Admin/AdminLogin.php
index 0a66c21..d15b39f 100644
--- a/Backend/Controllers/Admin/AdminLogin.php
+++ b/Backend/Controllers/Admin/AdminLogin.php
@@ -19,20 +19,18 @@ if(isset($_POST['aLogin'])){
             $_SESSION['userName'] = $userName;
             $_SESSION['admin'] = true;
             $_SESSION['success'] = "You are now logged in";
-            header('location: ../../../Frontend/index.html?login=success');
+            http_response_code(200);
         }else{
             session_destroy();
-            header('location: ../../../Frontend/index.html?login=failed?reason=password');
-            exit();
+            echo "Fail to verify password";
+            http_response_code(401);
         }
 
     }else{
         session_destroy();
-        header('location: ../../../Frontend/index.html?login=failed?reason=username');
-        exit();
+        echo "No user";
+        http_response_code(401);
     }
-
 }else{
-    header("location: ../../../Frontend/index.html?error=NoLogin");
-    exit();
+    http_response_code(400);
 }
\ No newline at end of file
diff --git a/Backend/Controllers/Admin/AdminSignup.php b/Backend/Controllers/Admin/AdminSignup.php
index 8c7910e..e47089b 100644
--- a/Backend/Controllers/Admin/AdminSignup.php
+++ b/Backend/Controllers/Admin/AdminSignup.php
@@ -10,17 +10,13 @@ if (isAdmin()){
         $admin->user_name = $_POST["newUsername"];
         $admin->password = $_POST["newPassword"];
         if ($admin->save()){
-            header("location: ../../../Frontend/Html/AdminPage.html?success=adminUserWasCreated");
-            exit();
+            http_response_code(201);
         }else{
-            header("location: ../../../Frontend/Html/AdminPage.html?error=errorWhileSaving");
-            exit();
+            http_response_code(500);
         }
     }else{
-        header("location: ../../../Frontend/Html/AdminPage.html?error=input:newAdmin.notSet");
-        exit();
+        http_response_code(400);
     }
 }else{
-    header("location: ../../../Frontend/index.html?error=isNotAdministrator");
-    exit();
+    http_response_code(401);
 }
\ No newline at end of file
diff --git a/Backend/Controllers/FileHandler/FileHandler.php b/Backend/Controllers/FileHandler/FileHandler.php
index 4e3acd5..cbd439f 100644
--- a/Backend/Controllers/FileHandler/FileHandler.php
+++ b/Backend/Controllers/FileHandler/FileHandler.php
@@ -15,13 +15,14 @@ function ZipFileHandler(string $gameFileName, string $gameFileTmp){
     if(in_array($headerType,$headerTypeMatch)){
         $gameFileNewName = uniqid("", true). "." .  $fileActualExtGame;
         if(empty($gameFileName)){
-            header("location: ../../../Frontend/index.html?error=emptyFile");
+            http_response_code(400);
             exit();
         }
         rename($gameFileTmp,"../../Games/".$gameFileNewName);
         return $gameFileNewName;
     }else{
-        header("location: location: ../../../Frontend/index.html?error=Wrong%20File%20Type");
+        echo "Wrong file type";
+        http_response_code(400);
         exit();
     }
 return NULL;
@@ -42,13 +43,14 @@ function imagesFileHandler(string $thumbnailFileName, string $thumbnailFileTmp){
     if(in_array($headerType,$headerTypeMatch)){
         $thumbnailFileNewName = uniqid("", true). "." .  $fileActualExtThumb;
         if(empty($thumbnailFileName)){
-            header("location: ../../../Frontend/index.html?error=emptyFile");
+            http_response_code(400);
             exit();
         }
         rename($thumbnailFileTmp,"../../../Frontend/images/".$thumbnailFileNewName);
         return $thumbnailFileNewName;
     }else{
-        header("location: location: ../../../Frontend/index.html?error=Wrong%20File%20Type");
+        echo "Wrong file type";
+        http_response_code(400);
         exit();
     }
     return NULL;
diff --git a/Backend/Controllers/FileHandler/gameHandler.php b/Backend/Controllers/FileHandler/gameHandler.php
deleted file mode 100644
index b3d9bbc..0000000
--- a/Backend/Controllers/FileHandler/gameHandler.php
+++ /dev/null
@@ -1 +0,0 @@
-<?php
diff --git a/Backend/Controllers/FileHandler/updateFiles.php b/Backend/Controllers/FileHandler/updateFiles.php
index 014a53a..3a1e649 100644
--- a/Backend/Controllers/FileHandler/updateFiles.php
+++ b/Backend/Controllers/FileHandler/updateFiles.php
@@ -36,14 +36,15 @@ if(isLogin()){
             $gameData->img = imagesFileHandler($thumbnailFileName,$thumbnailFileTmp);
         }
         $gameData->is_web_Based = $isWebBased;
-        $gameData->save();
-        header("location: ../../../Frontend/index.html?success=UpdatedFiles");
-        exit();
+        if(!$gameData->save()){
+            http_response_code(500);
+        }else{
+            http_response_code(201);
+        }
+
     }else{
-        header("location: ../../../Frontend/index.html?error=FailedUpload");
-        exit();
+        http_response_code(400);
     }
 }else{
-    header("location: ../../../Frontend/index.html?error=NoLogin");
-    exit();
+    http_response_code(401);
 }
\ No newline at end of file
diff --git a/Backend/Controllers/FileHandler/upload.php b/Backend/Controllers/FileHandler/upload.php
index 4a7d61d..cea1698 100644
--- a/Backend/Controllers/FileHandler/upload.php
+++ b/Backend/Controllers/FileHandler/upload.php
@@ -52,23 +52,24 @@ if(isLogin()){
                     $gameData->is_web_Based = $isWebBased;
                     $gameData->save();
                     $group->gameData()->associate($gameData);
-                    $group->save();
-                    header("location: ../../../Frontend/index.html?success=UploadedFile");
-                    exit();
+                   if(! $group->save()){
+                       http_response_code(500);
+                   }else{
+                       http_response_code(201);
+                   }
+
                 }
             }else{
-                header("location: ../../../Frontend/group.php?error=UploadFail");
-                exit();
+                http_response_code(400);
             }
         }else{
-            header("location: ../../../Frontend/group.php?error=TooManyUploads");
-            exit();
+            echo "Can only upload one file";
+            http_response_code(400);
         }
     }else{
-        header("location: ../../../Frontend/group.php?error=GameJamHasNotBegun");
-        exit();
+        echo "Can only upload when the game jam has started";
+        http_response_code(400);
     }
 }else{
-    header("location: ../../../Main.php?error=NoLogin");
-    exit();
+    http_response_code(401);
 }
\ No newline at end of file
diff --git a/Backend/Controllers/GameJam/NewGameJam.php b/Backend/Controllers/GameJam/NewGameJam.php
index f4101dd..f8bf5fb 100644
--- a/Backend/Controllers/GameJam/NewGameJam.php
+++ b/Backend/Controllers/GameJam/NewGameJam.php
@@ -17,18 +17,14 @@ if(isAdmin()){
         $gameJam->description = $_POST["description"];
 
         if($gameJam->save()){
-            header("location: ../../../Frontend/Html/AdminPage.html?success=UploadedFile");
-            exit();
+            http_response_code(201);
         }
         else{
-            header("location: ../../../Frontend/Html/AdminPage.html?error=FailToSaveGameJam");
-            exit();
+            http_response_code(500);
         }
     }else{
-        header("location: ../../../Frontend/Html/AdminPage.html?error=FailedToMakeGameJam");
-        exit();
+        http_response_code(400);
     }
 }else{
-    header("location: ../../../Frontend/index.html?error=NotAdmin");
-    exit();
+    http_response_code(401);
 }
\ No newline at end of file
diff --git a/Backend/Controllers/GameJam/UpdateGameJam.php b/Backend/Controllers/GameJam/UpdateGameJam.php
index 5c4aa23..b63ec20 100644
--- a/Backend/Controllers/GameJam/UpdateGameJam.php
+++ b/Backend/Controllers/GameJam/UpdateGameJam.php
@@ -22,16 +22,14 @@ if(isAdmin()){
 
             $gameJam->description = $_POST['description'];
             if ($gameJam->save()) {
-                header("location: ../../../Frontend/Html/AdminPage.html?success=UpdatedFile");
-                exit();
+                http_response_code(201);
+            }else{
+                http_response_code(500);
             }
         }
     }else{
-        header("location: ../../../Frontend/Html/AdminPage.html?error=FailedToUpdatedGameJam");
-        exit();
+        http_response_code(400);
     }
-
 }else{
-    header("location: ../../../Frontend/index.html?error=NotAdmin");
-    exit();
+    http_response_code(401);
 }
diff --git a/Backend/Controllers/Group/Login.php b/Backend/Controllers/Group/Login.php
index 292cdb6..3d18dc6 100644
--- a/Backend/Controllers/Group/Login.php
+++ b/Backend/Controllers/Group/Login.php
@@ -25,26 +25,23 @@ if(isset($_POST['login'])){
                $_SESSION['groupName'] = $groupName;
                $_SESSION['token'] = $token;
                $_SESSION['success'] = "You are now logged in";
-               header('location:  ../../../Frontend/index.php?login=success');
-               exit();
+               //header('location:  ../../../Frontend/index.php?login=success');
+               //exit();
+               http_response_code(200);
            }
            else{
                session_destroy();
-               header('location: ../../../Frontend/index.php?login=failed&?reason=token');
-               exit();
+               http_response_code(500);
            }
 
        }else{
            session_destroy();
-           header('location: ../../../Frontend/index.php?login=failed&?reason=password');
-           exit();
+           http_response_code(401);
        }
 
-   }
-   else{
+   }else{
        session_destroy();
-       header('location:  ../../../Frontend/index.php?login=failed&?reason=group');
-       exit();
+       http_response_code(400);
    }
 
 
diff --git a/Backend/Controllers/Group/ResetPassword.php b/Backend/Controllers/Group/ResetPassword.php
index 6b91f2a..4ad3cd7 100644
--- a/Backend/Controllers/Group/ResetPassword.php
+++ b/Backend/Controllers/Group/ResetPassword.php
@@ -12,19 +12,17 @@ if(isAdmin()){
             $password->password =  password_hash($_POST['newPassword'], PASSWORD_DEFAULT);
             echo $password;
             if(!$password->save()){
-                header("location: ../../../Frontend/Html/AdminPage.html?error=FailedSaveResetPassword");
-                exit();
+                http_response_code(500);
+            }else{
+                http_response_code(201);
             }
         }else{
-            header("location: ../../../Frontend/Html/AdminPage.html?success=SavedResetPassword");
-            exit();
+            http_response_code(400);
         }
 
     }else{
-        header("location: ../../../Frontend/Html/AdminPage.html?error=FailedToResetPassword");
-        exit();
+        http_response_code(400);
     }
 }else{
-    header("location: ../../../Frontend/index.html?error=NotAdmin");
-    exit();
+    http_response_code(401);
 }
\ No newline at end of file
diff --git a/Backend/Controllers/Group/SigningUp.php b/Backend/Controllers/Group/SigningUp.php
index fbf1d66..b3cd946 100644
--- a/Backend/Controllers/Group/SigningUp.php
+++ b/Backend/Controllers/Group/SigningUp.php
@@ -37,19 +37,18 @@ if(isset($_POST['regGroup'])){
         $password->remember_token = $token;
 
         if(!$password->save()){
-            return;
+            http_response_code(500);
+        }else{
+            http_response_code(201);
         }
 
         $_SESSION['groupName'] = $groupName;
         $_SESSION['token'] = $token;
         $_SESSION['success'] = "You are now logged in";
-        header("location: ../../../Frontend/index.html?success=GroupRegister");
-        exit();
+
     }else{
-        header("location: ../../../Frontend/index.html?error=CouldNotValidatePassword");
-        exit();
+        http_response_code(400);
     }
 }else{
-    header("location: ../../../Frontend/index.html?error=FailedRegister");
-    exit();
+    http_response_code(400);
 }
diff --git a/Backend/Controllers/Group/UpdateGruop.php b/Backend/Controllers/Group/UpdateGruop.php
index e54ff05..b96c655 100644
--- a/Backend/Controllers/Group/UpdateGruop.php
+++ b/Backend/Controllers/Group/UpdateGruop.php
@@ -10,17 +10,17 @@ if(isLogin()){
                 $group->group_name = $_POST['groupName'];
                 $group->group_amount = $_POST['groupAmount'];
                 $group->game_jam_id = $_POST['gameJamId'];
-                $group->save();
-                header("location: ../../../Frontend/index.html?success=YouHaveUpdated");
-                exit();
+                if(!$group->save()){
+                    http_response_code(500);
+                }else{
+                    http_response_code(201);
+                }
         }
     }else{
-        header("location: ../../../Frontend/index.html?error=CouldNotUpdate");
-        exit();
+        http_response_code(400);
     }
 }else{
-    header("location: ../../../Frontend/index.html?error=NotLogin");
-    exit();
+    http_response_code(401);
 }
 
 
diff --git a/Backend/Controllers/Group/UpdatePassword.php b/Backend/Controllers/Group/UpdatePassword.php
index b05709e..3bcd2a9 100644
--- a/Backend/Controllers/Group/UpdatePassword.php
+++ b/Backend/Controllers/Group/UpdatePassword.php
@@ -8,16 +8,16 @@ if(isLogin()){
         $password = Password::firstWhere("group_id", groupViaToken($_SESSION["token"])->id);
         if(passwordValidate($pass = $_POST['password'])){
             $password->password = password_hash($pass,PASSWORD_DEFAULT);
-            $password->save();
-            header("location: ../../../Frontend/index.html?success=PasswordUpdated");
-            exit();
+            if(!$password->save()){
+                http_response_code(500);
+            }else{
+                http_response_code(201);
+            }
         }
     }else{
-        header("location: ../../../Frontend/index.html?error=CouldNotUpdated");
-        exit();
+        http_response_code(400);
     }
 
 }else{
-    header("location: ../../../Frontend/index.html?error=NotLogin");
-    exit();
+    http_response_code(401);
 }
diff --git a/Backend/Controllers/Polls/1vote.php b/Backend/Controllers/Polls/1vote.php
index 85f00de..04ff428 100644
--- a/Backend/Controllers/Polls/1vote.php
+++ b/Backend/Controllers/Polls/1vote.php
@@ -14,17 +14,15 @@ if(isset($_POST['1Vote'])){
         $vote->points += 1;
         if(!empty($_POST['comment'])){
             $vote->comment = $_POST['comment'];
-        }else{
-            header("location: ../../../Frontend/index.html?error=EmptyField");
-            exit();
         }
-        $vote->save();
-        header("location: ../../../Frontend/index.html?success=YouHaveVoted");
-        exit();
+        if(!$vote->save()){
+            http_response_code(500);
+        }else{
+            http_response_code(201);
+        }
     }
 }else{
-    header("location: ../../../Frontend/index.html?error=YouCantVoted");
-    exit();
+    http_response_code(400);
 }
 
 
diff --git a/Backend/Controllers/Polls/GetVote.php b/Backend/Controllers/Polls/GetVote.php
index 22bd5ba..e421407 100644
--- a/Backend/Controllers/Polls/GetVote.php
+++ b/Backend/Controllers/Polls/GetVote.php
@@ -7,4 +7,6 @@ if(isLogin()){
     header('Content-Type: application/json;charset=UTF-8');
     echo Vote::where('group_id',groupViaToken($_SESSION['token'])->id)->get()->toJson(JSON_PRETTY_PRINT);
 
+}else{
+    http_response_code(401);
 }
diff --git a/Backend/Controllers/Polls/GetWinner.php b/Backend/Controllers/Polls/GetWinner.php
index a81710d..3613331 100644
--- a/Backend/Controllers/Polls/GetWinner.php
+++ b/Backend/Controllers/Polls/GetWinner.php
@@ -28,5 +28,7 @@ if(isAdmin() && isset($_GET['gameJamId'])){
     echo $winningGroups->toJson(JSON_PRETTY_PRINT);
 
 
+}else{
+    http_response_code(401);
 }
 
diff --git a/Backend/Controllers/keyWord/GetKeyWinner.php b/Backend/Controllers/keyWord/GetKeyWinner.php
index 1000131..0045d10 100644
--- a/Backend/Controllers/keyWord/GetKeyWinner.php
+++ b/Backend/Controllers/keyWord/GetKeyWinner.php
@@ -14,11 +14,19 @@ if (!isAdmin()){
         $all_group_in_game_jam_id = Group::where("game_jam_id", $game_jam->id)->pluck("id")->toArray();
         $find_all_keywords = KeyWord::whereIn("group_id", $all_group_in_game_jam_id)->inRandomOrder()->get();
         $game_jam->key_word = $find_all_keywords->first()->key_word;
-        $game_jam->save();
+        if(!$game_jam->save()){
+            http_response_code(500);
+        }else{
+            http_response_code(201);
+        }
 
         header("Access-Control-Allow-Methods: GET");
         header("Access-Control-Allow-Headers: X-Requested-With, Content-Type, Accept");
         header('Content-Type: application/json;charset=UTF-8');
         echo $find_all_keywords->pluck("key_word")->toJson(JSON_PRETTY_PRINT);
+    }else{
+        http_response_code(400);
     }
+}else{
+    http_response_code(401);
 }
\ No newline at end of file
diff --git a/Backend/Controllers/keyWord/NewKeyWord.php b/Backend/Controllers/keyWord/NewKeyWord.php
index 26164ea..5049f3b 100644
--- a/Backend/Controllers/keyWord/NewKeyWord.php
+++ b/Backend/Controllers/keyWord/NewKeyWord.php
@@ -25,23 +25,19 @@ if (isLogin()) {
 
             //Try to save it
             if(!$keyword->save()){
-                header("location: ../../../Frontend/index.html?error=FailedToSave");
-                exit();
+                http_response_code(500);
             }else{
-                header("location: ../../../Frontend/index.html?success=KeyWordSaved");
-                exit();
+                http_response_code(201);
             }
         }else{
-            header("location: ../../../Frontend/index.html?error=YouCantSubmitAnyMoreKeyWords");
-            exit();
+            echo "limited upload reached";
+            http_response_code(400);
         }
 
     }else{
-        header("location: ../../../Frontend/index.html?error=CouldNotSubmitKeyWord");
-        exit();
+        http_response_code(400);
     }
 }else{
-    header("location: ../../../Frontend/index.html?error=NotLogin");
-    exit();
+    http_response_code(401);
 }