# File lib/fog/identity/openstack/v2/requests/add_user_to_tenant.rb, line 16
          def add_user_to_tenant(tenant_id, user_id, role_id)
            role = data[:roles][role_id]
            data[:user_tenant_membership][tenant_id] ||= {}
            data[:user_tenant_membership][tenant_id][user_id] ||= []
            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