docs/openid-flow.txt
Client->OpenID Connect: Authenticate\n(to get profile)
Note right of OpenID Connect: OpenID Connect server\nmay do authorisation here
OpenID Connect->Client: Authentication Code
Client-->OpenID Connect: Authentication Code
Note right of OpenID Connect: Token endpoint uses the code\nto get an access token\n and an ID token
OpenID Connect-->Client: Tokens
Client-->OpenID Connect: Access token
OpenID Connect-->Client: User information