code: func (c *MTurk) SendBonus(input *SendBonusInput) (*SendBonusOutput, error) {
  	req, out := c.SendBonusRequest(input)
  	return out, req.Send()
  }
docs: // SendBonus API operation for Amazon Mechanical Turk.
  //
  // The SendBonus operation issues a payment of money from your account to a
  // Worker. This payment happens separately from the reward you pay to the Worker
  // when you approve the Worker's assignment. The SendBonus operation requires
  // the Worker's ID and the assignment ID as parameters to initiate payment of
  // the bonus. You must include a message that explains the reason for the bonus
  // payment, as the Worker may not be expecting the payment. Amazon Mechanical
  // Turk collects a fee for bonus payments, similar to the HIT listing fee. This
  // operation fails if your account does not have enough funds to pay for both
  // the bonus and the fees.
  //
  // Returns awserr.Error for service API and SDK errors. Use runtime type assertions
  // with awserr.Error's Code and Message methods to get detailed information about
  // the error.
  //
  // See the AWS API reference guide for Amazon Mechanical Turk's
  // API operation SendBonus for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeServiceFault "ServiceFault"
  //   Amazon Mechanical Turk is temporarily unable to process your request. Try
  //   your call again.
  //
  //   * ErrCodeRequestError "RequestError"
  //   Your request is invalid.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/mturk-requester-2017-01-17/SendBonus