I have Nuxt 3 app that is using the @sidebase/nuxt-auth library to add user authentication. That library is itself a wrapper around the next-auth library, but adapts it to work with Nuxt 3.
The app is: https://ctg-main-dev.netlify.app
User authentication is working 100% fine on my local machine. But I’m hitting a strange issue when deployed to Netlify. The entire OAuth flow works up until the very last step of setting the __Secure-next-auth.session-token at the very end of the auth exchange.
I have verified that:
- All the configuration on the OAuth provider side is correct
- All the deployment steps required for deploying next-auth are done
- I can see the full OAuth exchange happen successfully… the callback back to my app is successful. I can see my user found. I see in the DB that a new session ID is created. And I can see that the
__Secure-next-auth.session-tokencookie is attempted to be set (see screenshot).
However, the cookie is not persisted in the browser for some reason, and so the authentication does not succeed and I remain logged out.
Even more strange is that if I deploy the exact same app/code/configuration to Vercel it works perfectly fine. So it seems that something on the Netlify side is interrupting this cookie from being set properly, but I cannot figure out what it is.