Performed first authentication

moneymgr_mobile/lib/services/api/auth_api.dart

@@ -0,0 +1,30 @@
+// ignore_for_file: non_constant_identifier_names
+
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:moneymgr_mobile/services/api/api_client.dart';
+
+part 'auth_api.g.dart';
+part 'auth_api.freezed.dart';
+
+@freezed
+abstract class AuthInfo with _$AuthInfo {
+  const factory AuthInfo({
+    required int id,
+    required String mail,
+    required String name,
+    required int time_create,
+    required int time_update,
+  }) = _AuthInfo;
+
+  factory AuthInfo.fromJson(Map<String, dynamic> json) =>
+      _$AuthInfoFromJson(json);
+}
+
+/// Auth API
+extension AuthApi on ApiClient {
+  /// Get authentication information
+  Future<AuthInfo> authInfo() async {
+    final response = await execute("/auth/info", method: "GET");
+    return AuthInfo.fromJson(response.data);
+  }
+}