Rating:
Ok, let's see the `nc-lnvp` profile on Discord:

Of course that this is a hint, let's search about the E-mail on Github commits.

Easy, `[email protected]`.
After some HOURS OSINTing this E-mail on Google, Github, DuckDuckGo and whatever E-mail/Gmail recon tool, we found this website: [tools.epieos](https://tools.epieos.com/email.php).
Basically this site is a compilation of Google Account recon tool, [Holehe](https://github.com/megadose/holehe), and LinkedIn linked E-mails.

This is one of lot of solves about OSINT/Recon on Google E-mails. Google Accounts have some public information like GoogleID, E-mail, Contributions on Google Maps, Photos and Calendar, on this chall there is another way via Maps, as we can see on this comment:

So...
Flag: `dam{pax_vallejo}`