Remove   config.basePath ||= '/api/auth'

https://github.com/honojs/middleware/blob/58c8e237a99d049207c370750253032a4e9bf5ee/packages/auth-js/src/index.ts#L37C1-L38C1


Please remove this line that triggers the warning message.
```typescript
  config.basePath ||= '/api/auth'
```
```
[auth][warn][env-url-basepath-redundant] Read more: https://warnings.authjs.dev#env-url-basepath-redundant
```