I changed my username, and now when I try to join a server it says "Failed to log in un verified username!" so now I cant join any server with my friends.

I open the Minecraft launcher, I click play, it takes an average of 5 minutes to load. Once it's finally loaded, I go to "Multiplayer", I click the server I want to join, it says "Connecting.." for 2 seconds and then says "Failed to log in, un verified username. It's like that on every server, Hypixel, my friend's server, HiveMC, everything! All I want to do is play with my friends and I cant now because of this bug. Please help me once you see this! 😞