send Alert
Sends the alert message to the given contact. This will trigger the Zello.Listener.onOutgoingAlertMessageSent event if successful, or the Zello.Listener.onOutgoingAlertMessageSendFailed event if there is an error.
Parameters
target
The contact to send the alert to.
message
The text to send.
level
Optional; The alert level to send. Only applicable for channels.