/userfriends/[userId] endpoint

[mozsarmate]

No description provided.

[FearsomeRover]

Friends are the useres, with whom you already had a common transaction/bill. Or should we add the option to add friends manually? I think it would be helpful, but requires updating the schema and the database also.

[FearsomeRover]

The endpoint will rather be /user/{id}/friends

[mozsarmate]

I dont think that adding friends manually would be a helpful function, or - if it turns out to be missing - we could add it later