[AlphaWolf250]

Sooo, I just changed my MC username, and it's causing problems. When I tried to login to the server, I get an error saying 'Failed to Verify Username'. Now I try restarting MC multiple times, and that doesn't work. I also tried restarting my doomed-to-die-from-computer-rot PC and of course that doesn't work either. Any help would be appreciated, thanks!

[Nether_Ruler]

Try logging out. Open the launcher, click "change user" and click log out.
Then log back in