How can I open external port for able to connect to my localhost from the outside?

Hi everyone, i faced with unable to get external port for connection to my localhost from the outside.
I tried const response = await stun.request('stun.l.google.com:19302'); let xorAddress = response.getXorAddress(); //console.log(xorAddress.address + xorAddress.port) but data from method getXorAddress() is wrong.
Help me please get ip and port for able to connect to my localhost from the outside.

[reklatsmasters]

You have to check type of received message. Promise resolved, it means response is arrived. @megamuha