Maybe npub was the wrong term. What is this called?

fedi:user:@npub1uy0d3kxytq43v2kpsxugrf5m48s4m35cxegeg9edpmfreckrmn3sthlel4:m1.8fa.in 

 fedi:user:@npub1dalsknffa0p2mznf790vyk6nclkcwnqea5ekrh9jxmpasz5vmzwsckfgp7:m1.8fa.in

got the npub in it just has some decorator stuff  

 I don't know why, but I can't send sats using this username. :/