defaultProvider does not work with Custom OAuth

[tschni]

Environment

• Operating System: Windows_NT
• Node Version: v20.18.0
• Nuxt Version: 3.13.2
• CLI Version: 3.14.0
• Nitro Version: 2.9.7
• Package Manager: pnpm@8.15.3
• Builder: -
• User Config: -
• Runtime Modules: -
• Build Modules: -

Reproduction

https://github.com/tschni/sidebase-nuxt-auth-default-provider-issue

Describe the bug

I have set up a custom OAuth provider with Authjs. In nuxt.config.ts I have set this as defaultProvider and activated the globalAppMiddleware.

Now I would have expected that when I opened the Nuxt app, I would automatically be redirected to the login page of my OAuth provider. This also fits with the following statement from the documentation: “Setting this here will also affect the global middleware behavior. For instance, when you set it to github and the user is unauthorized, they will be directly forwarded to the Github OAuth page instead of seeing the app-login page”.

However, there is a redirect to /api/auth/signin, where I first have to click a sign in button. Since I have only defined this one provider, I would of course like to skip this step and be redirected directly to the login page of my provider.

There seems to have been the same error before, but without a helpful solution: #531

Additional context

No response

Logs

No response

[phoenix-ru]

Could you please check that your CSRF token is verified?

https://github.com/nextauthjs/next-auth/blob/c15d9a5b7a435f4301572745add89cc99db30aef/packages/next-auth/src/core/index.ts#L241-L253

Sadly, I can't provide much other help as I don't have enough context and haven't set up custom providers with next-auth. Their current guide is lacking a section about CSRF protection
https://next-auth.js.org/configuration/providers/oauth#using-a-custom-provider

[tschni]

How do I check the CSRF token? I'm not really familiar with next-auth unfortunately. However, I did not set anything out of the ordinary and strictly followed the instructions in the documentation.