Quick API that will denies requests w/o a JWT token and updates a user's status
OAuth 2.0 - is a protocol that allows a user to grant limited access to their resources on one site, to another site, without having to expose their credentials.
Auth0 - is an organization, who manages Universal Identity Platform for web, mobile and IoT can handle any of them — B2C, B2B, B2E, or a combination.