2021
Parecki - Apidays LIVE interface 2021 - The State of OAuth of 24:35
    https://www.youtube.com/watch?v=W5ajhfWmvHE
    https://www.youtube.com/watch?v=ELdFoIYTBL8
2019
Okta - An Illustrated Guide to OAuth and OpenID Connect of 16:35
    https://www.youtube.com/watch?v=t18YB3xDfXI
    https://developer.okta.com/blog/2019/10/21/illustrated-guide-to-oauth-and-oidc
    !!! + terminology
    ! OpenID OIDC (not only a key, but extra user data)
    ! ID Token - is JWT-formatted token
    ! client can extract info with JWT Decoder
    ! data inside it are called "Claims"
2017
Tran - Beyond OAuth2
    https://www.infoq.com/presentations/oauth2-microservices-security