implementing multiple modes for operation

implement operationModes:
- local: With local database
- synapse: use register-API of synapse

internal/identity_single.php

@@ -61,5 +61,5 @@ try {
         "error" => $e->getMessage()
     ];
 }
-print (json_encode($response, JSON_PRETTY_PRINT) . "\n");
+print (json_encode($response, JSON_PRETTY_PRINT));
 ?>