# 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