Found broken `/guides/providers/custom-provider` link. Please fix!

[mahendra1390]

[jonas-is-coding]

This appears reproducible and should be handled as a framework-level issue. The best immediate path is to keep production on the last known stable behavior, provide a minimal repro with exact versions, and validate the fix against that repro before rollout. That gives a clear route to resolution without introducing additional risk.

[cschanhniem]

The broken link /guides/providers/custom-provider is referenced from the provider documentation templates. Looking at the v5 docs structure, the correct path is /guides/configuring-oauth-provider in the current docs version, or /getting-started/providers for the provider index. The link should be updated in the provider template file at packages/core/src/providers/template.ts if thats still active in the v5 branch.

I can confirm the right target by checking the live docs at next-auth.js.org — the custom provider guide lives under the "Getting Started" or "Configuration" section depending on which version of the docs is deployed. Id open a PR to fix this if the maintainers can confirm which docs version is authoritative for the current branch.