Removed next-auth and refactored authentication

src/lib/actions.ts

@@ -1,35 +1,8 @@
 'use server';
 
-import { signIn, signOut } from '@/auth';
-import { AuthError } from 'next-auth';
-import { redirect } from 'next/navigation';
+import { cookies } from 'next/headers';
 
-export async function authenticate(_prevState: string | undefined, formData: FormData): Promise<string> {
-  try {
-    const result = await signIn('credentials', {
-      redirect: false,
-      token: formData.get('token'),
-    });
-
-    if (result?.error) {
-      return 'Invalid token';
-    }
-
-    redirect('/admin');
-  } catch (error) {
-    if (error instanceof AuthError) {
-      switch (error.type) {
-        case 'CredentialsSignin':
-          return 'Invalid token';
-        default:
-          return 'Something went wrong';
-      }
-    }
-    throw error;
-  }
-}
-
-export async function performLogout() {
-  await signOut({ redirectTo: '/', redirect: true });
-  redirect('/');
+export async function deleteSessionCookie() {
+  const cookieStore = await cookies();
+  cookieStore.delete('session');
 }