"Lasse Collin," as other posters here have found, does not seem to exist as an experienced coder. Oddly, there is a Swedish jazz musician named Lasse Collin, which would otherwise be one of those names, especially the last name, that would stick out. Instead it is buried under a lot of mentions of a musician.
Lasse Collin the contributor is findable, especially if you add "tukaani" to the search. But not in any other context, unless that's what old jazz musicians do in their retirement.
I don't think that's what they meant. The idea is to find information about their personal life, not OSS contributions. Something that proves they're a real person.
