code: func (cli *OpsGenieClient) User() (*OpsGenieUserClient, error) {
  	cli.makeHTTPTransportSettings()
  
  	userClient := new(OpsGenieUserClient)
  	userClient.SetOpsGenieClient(*cli)
  
  	if cli.opsGenieAPIURL == "" {
  		userClient.SetOpsGenieAPIUrl(endpointURL)
  	}
  
  	return userClient, nil
  }
docs: // User instantiates a new OpsGenieUserClient.
  // Deprecated: Please use UserV2() method