start implementing multiple modes for operation

- synapse: Only trigger register calls and do not store anything for longterm
- local: Provide an identity store and register to the own backend

internal/login.php

@@ -108,5 +108,5 @@ try {
     error_log("Auth failed with error: " . $e->getMessage());
     $response["auth"]["error"] = $e->getMessage();
 }
-print (json_encode($response, JSON_PRETTY_PRINT) . "\n");
+print (json_encode($response, JSON_PRETTY_PRINT));
 ?>