Yes, you can. Create a new account with a different email address from the one you're using (Tip: don't use the one you use for Facebook). That will give you a different Spotify username.
Once you have this new account, fill out the contact form, and someone from Spotify will be happy to help you migrate your Premium privileges, library, playlists, friends, etc. to this new account.
Hope it helps. 🙂
bumping to see username
Not posible! Only option is to scrap your emailadress, get in contact with your email provider, then Spotify to remove your account, and start all over....
The reason is that Spotify has made "username" as key - Stupid! Looking forward to GDPR!!!! May2018! Then Spotify will HAVE to Comply!!
And how can we do that when you don't allow us to make a new accont with the same e-mail address?
It would be best if you used a different email address to create the new account.
There is currently no way to change your username! 😞 It should be available soon tho