customerReset not working properly getting response undefined

[9mm-energy-drin]

customerReset(_id, _resetToken, _password😞 Promise<any> {

    console.log(_id, _password, _resetToken);

    const id = this.client.variable('id', 'ID!');

    const input = this.client.variable('input', 'CustomerResetInput!');

    const mutation = this.client.mutation('myMutation', [id, input], (root) => {

      root.add('customerReset', { args: { id, input } }, (customerReset) => {

        customerReset.add('userErrors', (userErrors) => {

          userErrors.add('message'),

            userErrors.add('field')

        })

        customerReset.add('customer', (customer) => {

          customer.add('id')

        })

      })

    })

    return this.client.send(mutation, { "id": _id, "input": { resetToken: _resetToken, password: _password } }).then();

  }

passing id,token and password did i miss anything in this code. Response I am getting Undefined.