class Doorkeeper::OAuth::Token

def authenticate(request, *methods)
  if (token = from_request(request, *methods))
    access_token = Doorkeeper.config.access_token_model.by_token(token)
    if access_token.present? && Doorkeeper.config.refresh_token_enabled?
      access_token.revoke_previous_refresh_token!
    end
    access_token
  end
end