rename frontend directory to frontend

crawler/frontend/src/auth/authService.ts

@@ -0,0 +1,18 @@
+import { User, UserManager } from 'oidc-client-ts';
+import { oidcConfig } from './config';
+
+const userManager = new UserManager(oidcConfig);
+
+export const login = () => userManager.signinRedirect();
+export const logout = () => userManager.signoutRedirect();
+export const handleCallback = () => userManager.signinRedirectCallback();
+
+export const getUser = async (): Promise<User | null> => {
+    try {
+        const user = await userManager.getUser();
+        return user;
+    } catch (error) {
+        console.error('Error fetching user:', error);
+        return null;
+    }
+};