//! Concrete `IdentityProvider` implementations.
//!
//! Today:
//! * [`mock::MockProvider`] -- always verifies. Used by tests, demos,
//! and any environment where ID.me credentials aren't available.
//! * [`idme::IdMeProvider`] -- ID.me OAuth 2.0 + PKCE flow. Wired and
//! ready; activates the moment we receive sandbox credentials.