def authorize_gpg_key
      gpg_key_id = product_params[:gpg_key_id]
      if gpg_key_id
        gpg_key = ContentCredential.readable.where(:id => gpg_key_id, :organization_id => @organization).first
        throw_resource_not_found(name: 'gpg key', id: gpg_key_id) if gpg_key.nil?