//Lookup Slack id for channel, group, or im
func lookupSlackId(api *slack.Slack, name string) (string, error) {
channel, err := api.FindChannelByName(name)
if err == nil {
return channel.Id, nil
}
group, err := api.FindGroupByName(name)
if err == nil {
return group.Id, nil
}
im, err := api.FindImByName(name)
if err == nil {
return im.Id, nil
}
return "", fmt.Errorf("No such channel, group, or im")
}
