def uploader_authorization_adapter
      adapter = Uploader.authorization_adapter

      if adapter.is_a? String
        ActiveSupport::Dependencies.constantize(adapter)
      else
        adapter
      end
    end
def uploader_authorization_adapter
      adapter = Uploader.authorization_adapter

      if adapter.is_a? String
        ActiveSupport::Dependencies.constantize(adapter)
      else
        adapter
      end
    end
Returns the class to be used as the authorization adapter