Attention: WARNING regarding the NEXTAUTH_URL in the Development Console

While working on my Next.js web application with next-auth for authentication, I came across a warning message in the development console. The message is related to reloading the environment from the .env.local file and compiling certain modules within the application.

 Reload env: .env.local
 ○ compiling /signin/page ...
 ✓ Compiled /signin/page in 5s (602 modules)
 ✓ Compiled /api/auth/[...nextauth]/route in 2.1s (975 modules)
[next-auth][warn][NEXTAUTH_URL]

My project uses Next.js version 13.5.2 and pnpm package manager. I have defined essential environment variables such as GOOGLE_CLIENT_ID, GOOGLE_CLIENT_SECRET, and AUTH_SECRET in my .env file.

GOOGLE_CLIENT_ID=<CLIENT_ID>
GOOGLE_CLIENT_SECRET=<CLIENT_SECRET>
AUTH_SECRET=<AUTH_SECRET>

I am seeking clarification on the significance of this warning message and whether it requires any action on my part. How can I resolve this warning effectively?

I adhered to the setup guidelines provided in the next-auth documentation, including proper configuration of environment variables like GOOGLE_CLIENT_ID, GOOGLE_CLIENT_SECRET, and AUTH_SECRET in the .env file.

typescriptnext.jsenvironment-variablespnpm

Answer №1

APP_URL is the primary URL for your Next.js application.

When deploying on Vercel, the VERCEL_URL environment variable will be used automatically, eliminating the need to specify APP_URL.

For more information, visit: https://next-auth.js.org/warnings#app_url

If you are running the app locally, remember to set it in the .env.local file:

APP_URL=http://localhost:3000

Please update the URL as needed if it differs from the default one mentioned here.

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