throwing 409 on duplicate document

app/config/errors.php

@@ -200,6 +200,11 @@ return [
         'description' => 'The identity could not be found. Please sign in with OAuth provider to create identity first.',
         'code' => 404,
     ],
+    Exception::USER_IDENTITY_ALREADY_EXISTS => [
+        'name' => Exception::USER_IDENTITY_ALREADY_EXISTS,
+        'description' => 'The identity already exists.',
+        'code' => 409,
+    ],
     Exception::USER_UNAUTHORIZED => [
         'name' => Exception::USER_UNAUTHORIZED,
         'description' => 'The current user is not authorized to perform the requested action.',

app/controllers/api/vcs.php

@@ -4,6 +4,7 @@ use Appwrite\Auth\OAuth2\Github as OAuth2Github;
 use Utopia\App;
 use Appwrite\Event\Build;
 use Appwrite\Event\Delete;
+use Utopia\Database\Exception\Duplicate;
 use Utopia\Validator\Host;
 use Utopia\Database\Database;
 use Utopia\Database\Document;
@@ -368,7 +369,8 @@ App::get('/v1/vcs/github/callback')
 
                 $dbForConsole->updateDocument('identities', $identity->getId(), $identity);
             } else {
-                $identity = $dbForConsole->createDocument('identities', new Document([
+                try {
+                    $dbForConsole->createDocument('identities', new Document([
                     '$id' => ID::unique(),
                     '$permissions' => [
                         Permission::read(Role::any()),
@@ -383,7 +385,10 @@ App::get('/v1/vcs/github/callback')
                     'providerAccessToken' => $accessToken,
                     'providerRefreshToken' => $refreshToken,
                     'providerAccessTokenExpiry' => DateTime::addSeconds(new \DateTime(), (int)$accessTokenExpiry),
-                ]));
+                    ]));
+                } catch (Duplicate) {
+                    throw new Exception(Exception::USER_IDENTITY_ALREADY_EXISTS);
+                }
             }
         }
 

src/Appwrite/Extend/Exception.php

@@ -76,6 +76,7 @@ class Exception extends \Exception
     public const USER_PASSWORD_MISMATCH            = 'user_password_mismatch';
     public const USER_SESSION_NOT_FOUND            = 'user_session_not_found';
     public const USER_IDENTITY_NOT_FOUND           = 'user_identity_not_found';
+    public const USER_IDENTITY_ALREADY_EXISTS      = 'user_identity_already_exists';
     public const USER_UNAUTHORIZED                 = 'user_unauthorized';
     public const USER_AUTH_METHOD_UNSUPPORTED      = 'user_auth_method_unsupported';
     public const USER_PHONE_ALREADY_EXISTS         = 'user_phone_already_exists';