Auth0 SDK not working with other serverless functions using NextJS and Vercel

Describe the problem

When using the NextJS Auth0 SDK you get a 404 not found error instead of getting redirected to the login page. Callback and logout URL are correctly specified to http://localhost:3000 and http://localhost:3000/api/callback

What was the expected behavior?

A redirect to the login page and the other serverless functions still working.

Reproduction

1. Use NextJS together with Vercel to handle serverless functions.
2. Create serverless functions in a different language than JS. In my case this would be go. These serverless functions are located outside the pages/api/auth folder (they are in the root api folder)
3. Try to access the login/logout/… API routes

Environment

• Version of this library used: 1.3.1
• Which framework are you using, if applicable: NextJS
• Other modules/plugins/libraries that might be involved: GoLang serverless functions
• Any other relevant information you think would be useful: The website is started by using vercel dev. I am also using Go serverless functions.

[adamjmcgrath]

@PumPum7 - doesn’t sound like this is an problem with the SDK and you have resolved your issue, so closing.

Feel free to ping me if you’d like me to reopen it

[dlcaio]

Hey @PumPum7, can you please share more details on how you managed to get it to work ?

For example, what version of next did you use ? Or anything else you may find relevant.

I tried moving the pages/api/auth[…auth0].js file to <root>/api/auth/ but that did not help me. Same 404 error.

Cheers!