default boolean provision(final Authentication authentication, final Credential credential,
                              final RegisteredService registeredService) {
        return provision(authentication.getPrincipal(), credential);
    }
Create principal.

@param authentication    the authentication
@param credential        the credential
@param registeredService the registered service
@return true /false
api/cas-server-core-api-services/src/main/java/org/apereo/cas/authentication/principal/PrincipalProvisioner.java