= "How-to" Guides This page is under construction. == Table of contents ** Obtain an access token using a specific grant_type: *** `authorization_code` *** `client_credentials` *** `refresh_token` ** Customize form based login ** Authenticate a user with two-factor authentication ** Customize the user consent page ** Authenticate using OpenID Connect 1.0 authorization_code flow ** Customize the OpenID Connect 1.0 UserInfo response ** Authenticate using social login, e.g. Google ** Authenticate a user in a Single Page Application with PKCE ** Customize client authentication for specific authentication methods ** Handle errors and customize the OAuth 2.0 Error response ** Authorize an access token containing custom authorities, e.g. roles, groups, permissions, etc. *** Customize the headers / claims in a JWT ** Deny access for a revoked JWT access token *** Introspect / revoke an access token ** Provide a JWK source backed by a key rotation strategy ** Implement the core services with JPA: *** `RegisteredClientRepository` *** `OAuth2AuthorizationService` *** `OAuth2AuthorizationConsentService`