protected String extractAccessTokenFrom(final TokenCredentials tokenCredentials) {
        return OAuth20JwtAccessTokenEncoder.toDecodableCipher(accessTokenJwtBuilder).decode(tokenCredentials.getToken());
    }
This is {@link OAuth20AccessTokenAuthenticator}.

@author Misagh Moayyed
@since 6.1.0
support/cas-server-support-oauth-core-api/src/main/java/org/apereo/cas/support/oauth/authenticator/OAuth20AccessTokenAuthenticator.java