[Honey]

Do social engineering.

Make a fake ID, talk to that person for like 30-40 minute and make an IP logger from anywhere. Make it short or just send the phonetic domain created by the IP logger. Now short the URL(if you want) by going to bit.ly and then send that URL to the user. You'll find the IP of the user. Later, make sure you let that person know that he/she was a part of this because doing it without his/her permission is a serious crime because you're attempting to do a fraud(kinda)(not unless you're an LEO).

Dayum that's a next level trick

To add to that, nowadays I think people are less willing to click on random links, but then again its facebook where It can be anyone from a kid to a grandpa behind the profile you're looking to track.