Keycloak.AuthServices provides robust authentication mechanisms for both web APIs and web applications. For web APIs, it supports JWT Bearer token authentication, which allows clients to authenticate to the API by providing a JWT token in the Authorization header of their requests. For web applications, it supports OpenID Connect, a simple identity layer on top of the OAuth 2.0 protocol, which allows clients to verify the identity of the end-user, obtain basic profile information about the end-user, etc.