The message will be sent to the chat/channel by the specified in the settings file...
Get the of the desired chat using the bot @getmyid_bot. If you need to get the of a specific chat - you need to add the bot @getmyid_bot to the chat and it will immediately send an id (for a chat this is a negative number) To get from a telegram channel - send any post from the channel to the bot @getmyid_bot...
In order for the bot to send you a private message, you need to start a dialogue with the bot by pressing the /start button. If you have specified a chat or channel id (which is a negative number) the bot must be in that chat.