dartway_auth_providers_shared

The contract of signing in with Google and Apple: DwSignInWithProvider, DwAuthProvider and the refusals, shared by the server (dartway_auth_providers_server) and the app.

Register it in the protocol both sides build:

final appProtocol = DwWireProtocol([
  ...dwAuthProvidersProtocolEntries,
  ...
], include: DwWireProtocol.core);

Documentation: docs/4-server/auth-identity.md.