Update docs

README.md

@@ -86,7 +86,6 @@ TURSO_AUTH_TOKEN=
 
 # Auth.js =>
 AUTH_SECRET=
-AUTH_URL=
 
 # Github Provider =>
 GITHUB_ID=
@@ -106,7 +105,7 @@ GOOGLE_CLIENT_SECRET=
 **Auth.js:**
 
 - [Get Auth.js **Secret**](https://authjs.dev/getting-started/providers/oauth-tutorial#adding-environment-variables).
-- ``AUTH_URL`` is the URL of your Auth.js API, for example, ``/api/auth``.
+- ``AUTH_URL`` is the URL of your Auth.js API, for example, ``/api/auth``. You can change it in the [**``auth.ts`` file**](https://github.com/pheralb/slug/blob/next/src/auth.ts#L20).
 
 **Github Credentials:**