Update graphql files structure

src/lib/graphql/user/UserMutation.ts

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+import gql from 'graphql-tag';
+
+export const USER_LOGIN = gql`
+    mutation USER_LOGIN($password: String!, $username: String!) {
+        login(input: { password: $password, username: $username }) {
+            accessToken
+            refreshToken
+        }
+    }
+`;
+
+export const USER_REFRESH = gql`
+    mutation USER_REFRESH($refreshToken: String!) {
+        refreshToken(input: { refreshToken: $refreshToken }) {
+            accessToken
+        }
+    }
+`;