feat: read post-login redirect URL from environment variable

Author: mridang

README.md

@@ -80,6 +80,10 @@ ZITADEL_CALLBACK_URL="http://localhost:3000/api/auth/callback/zitadel"
 # Redirect URI configured in your ZITADEL application settings.
 ZITADEL_POST_LOGOUT_URL="http://localhost:3000/api/auth/logout/callback"
 
+# Optional. URL where users are redirected after successful login.
+# Defaults to "/profile" if not specified.
+ZITADEL_POST_LOGIN_URL="/profile"
+
 # Auth.js base URL for your application. In development, this is typically
 # http://localhost:3000. In production, use your actual domain.
 AUTH_TRUST_HOST=true

src/lib/auth.ts

@@ -281,7 +281,10 @@ export function createAuthOptions(getEnv: GetEnvFunction): FullAuthConfig {
        * @returns The URL to redirect the user to after successful login
        */
       async redirect({ baseUrl }: { baseUrl: string }) {
-        return `${baseUrl}/profile`;
+        const postLoginUrl = getEnv('ZITADEL_POST_LOGIN_URL') || '/profile';
+        return postLoginUrl.startsWith('http')
+          ? postLoginUrl
+          : `${baseUrl}${postLoginUrl}`;
       },
 
       /**