useUnlinkProvider
Remove a sign-in method.
const { unlinkProvider } = useUnlinkProvider();
await unlinkProvider('google.com');Returns
unlinkProvider(providerId) resolves to { success: true, user, credential } or a failure result. Also exposes status, isPending, error, and reset.
Provider ids are Firebase's own: "google.com", "password", "github.com", and so on.
Notes
Firebase refuses to unlink the last remaining method, so an account can't be locked out this way. That refusal arrives as a normal failure result.