code: func (c *Client) GetChannelUsers(name string) (*Users, error) {
  	path := fmt.Sprintf("/apps/%s/channels/%s/users", c.AppId, name)
  	u, err := createRequestURL("GET", c.Host, path, c.Key, c.Secret, authTimestamp(), c.Secure, nil, nil, c.Cluster)
  	if err != nil {
  		return nil, err
  	}
  	response, err := c.request("GET", u, nil)
  	if err != nil {
  		return nil, err
  	}
  	return unmarshalledChannelUsers(response)
  }
docs: /*
  Get a list of users in a presence-channel by passing to this method the channel name.
  
  	users, err := client.GetChannelUsers("presence-chatroom")
  
  	//users=> &{List:[{Id:13} {Id:90}]}
  
  */