[fiatjaf]

I'm working on https://github.com/fiatjaf/accountd.xyz, which is basically a universal association of profiles (identified by a username) with accounts on "silos" like twitter, github, trello and email addresses in general. You can use it either for user login or to post-association of accounts with profiles. There's no documentation, but you can see it working on https://sitios.xyz/ and https://sitios.xyz/trello.

Do you think it is interesting somehow?

[BerislavLopac]

This is not quite what I had in mind, but it's quite interesting. One recommendation: don't use a username, that approach has a number of flaws you can easily avoid here.