A username: Sherlock, Maigret, Blackbird.
Three passes over the same string, because their site lists differ from each other and all three go stale between releases. Sherlock checks its maintained list and returns the profiles the handle resolves to. Maigret casts wider and pulls what the profile page itself exposes. Blackbird is the third opinion. What comes back is where the string exists, which is a shorter list than where the person is.






