class CommonResponse { String? error; String? message; int? sessionExists; CommonResponse({this.error, this.message, this.sessionExists}); CommonResponse.fromJson(Map json) { error = json['error']; message = json['message']; sessionExists = json['session_exists']; } Map toJson() { final Map data = new Map(); data['error'] = this.error; data['message'] = this.message; data['session_exists'] = this.sessionExists; return data; } }