Enhance API error handling and response structure; update app name retrieval method

api/api.php

@@ -40,7 +40,7 @@ class gbAPI {
                     "error_text" => "Authentication failed."
                 ];
 
-                $this->answer($status, $data);
+                $this->answer($status, $data, true);
             }
         }
     }
@@ -181,6 +181,7 @@ class gbAPI {
         // Check if request is internal or external
         if ($this->internal) {
             $this->response = $return;
+            return;
         }else{
             http_response_code($status);
             header("Content-Type: application/json; charset=UTF-8");