Added default OAuth handler a unique scheme

app/controllers/api/account.php

@@ -483,6 +483,7 @@ $utopia->get('/v1/account/sessions/oauth2/:provider/redirect')
             if($state['success'] === $oauthDefaultSuccess) { // Add keys for non-web platforms
                 $state['success'] = URLParser::parse($state['success']);
                 $query = URLParser::parseQuery($state['success']['query']);
+                $query['project'] = $project->getId();
                 $query['domain'] = COOKIE_DOMAIN;
                 $query['key'] = Auth::$cookieName;
                 $query['secret'] = Auth::encodeSession($user->getId(), $secret);

app/views/home/auth/oauth2.phtml

@@ -8,6 +8,9 @@
         document.getElementById('message').style.display = 'block';
     }, 25);
 
-    window.location = 'appwrite-callback://'+window.location.search;
+    const query = new URLSearchParams(window.location.search);
+    const project = query.get('project');
+
+    window.location = 'appwrite-callback-'+project+'://'+window.location.search;
 </script>
 <hr />