    # File lib/fog/openstack/requests/identity/add_user_to_tenant.rb, line 15
            def add_user_to_tenant(tenant_id, user_id, role_id)
              role = self.data[:roles][role_id]
              self.data[:user_tenant_membership][tenant_id] ||= {}
              self.data[:user_tenant_membership][tenant_id][user_id] ||= []
              self.data[:user_tenant_membership][tenant_id][user_id].push(role['id']).uniq!

              response = Excon::Response.new
              response.status = 200
              response.body = {
                'role' => {
                  'id'   => role['id'],
                  'name' => role['name']
                }
              }
              response
            end