The main branch was using auth:sanctum middleware on routes but
config/auth.php had no sanctum guard defined. This caused:
Auth guard [sanctum] is not defined.
Fix:
1. Add the sanctum guard entry to config/auth.php with
driver=sanctum and provider=users
2. Register the sanctum guard driver in AppServiceProvider::boot()
as a safety net via Auth::resolved()
root
5cc9803330