impl MSC2964: OIDC token flow

# Conflicts:
#	Cargo.lock

src/api/client/oidc/mod.rs

@@ -1,3 +1,21 @@
+/// OIDC
+///
+/// Stands for OpenID Connect, and is an authentication scheme relying on OAuth2.
+/// The MSC2964 Matrix Spec Proposal describes an authentication process based
+/// on OIDC with restrictions. See the [sample flow] for details on what's expected.
+///
+/// This module implements the needed endpoints. It relies on [`service::oidc`] and
+/// the [oxide-auth] crate.
+///
+/// [oxide-auth]: https://docs.rs/oxide-auth
+/// [sample flow]: https://github.com/sandhose/matrix-spec-proposals/blob/msc/sandhose/oauth2-profile/proposals/2964-oauth2-profile.md#sample-flow
+
 mod discovery;
+mod login;
+mod authorize;
+mod token;
 
 pub(crate) use self::discovery::get_auth_metadata;
+pub(crate) use self::login::oidc_login;
+pub(crate) use self::authorize::{authorize, authorize_consent};
+pub(crate) use self::token::token;