You need to add the required dependencies:

• the javaee-pac4j or the jakartaee-pac4j library (groupId: org.pac4j, version: 8.0.1)
• the appropriate pac4j submodules (groupId: org.pac4j, version: 6.0.2): pac4j-oauth for OAuth support (Facebook, Twitter...), pac4j-cas for CAS support, pac4j-ldap for LDAP authentication, etc.

All released artifacts are available in the Maven central repository.