feat: Implement updateUser mutation

packages/backend/src/graphql/mutations/update-user.ts

@@ -0,0 +1,21 @@
+import Context from '../../types/express/context';
+
+type Params = {
+  email: string;
+  password: string;
+};
+
+const updateUser = async (
+  _parent: unknown,
+  params: Params,
+  context: Context
+) => {
+  const user = await context.currentUser.$query().patchAndFetch({
+    email: params.email,
+    password: params.password,
+  });
+
+  return user;
+};
+
+export default updateUser;