feat: api token login

lib/models/error_response.dart

@@ -0,0 +1,21 @@
+import 'package:http/http.dart' as http;
+import 'package:logging/logging.dart';
+
+final _logger = Logger('ErrorResponse');
+
+class ErrorResponse {
+  String? name;
+  http.Response _response;
+
+  ErrorResponse({
+    this.name,
+    http.Response? response,
+  }) : _response = response ?? http.Response('', 418);
+
+  void storeError(http.Response response, [Object? error]) {
+    _logger.warning('for $name got response: $response');
+    _response = response;
+  }
+
+  http.Response get response => _response;
+}