As a new user, I was able to get a pronounceable(ish) 4-letter username. It's not always hard. But Prologue is an English word and a lot of English words are taken. (and probably many words in other languages, too)
When I try to search for your name, I only get hits on some country radio channel. I could search for ‘wezl hacker news’, but it would have been easier if you had chosen a non-colliding name to begin with.