Learned a while ago: if you have the username from a GitHub or GitLab user, you can download interesting that sometimes can make life easier (but not necessarily more secure):
github.com/username.keysgives you their public SSH keysgitlab.com/username.keysgives you their public SSH keysgithub.com/username.pnggives you their profile image
And that there are tools like gh, glab and age that can make direct use of them.
I love Twitter, so thanks for these for teaching me these little tricks:
The Wiert Corner - irregular stream of stuff 