No longer using email to login???

This is the first time I have logged into the new community site.  Up until now I had been logging into the community using my email address but it turns out that now the community login uses a username that I did not have captured in 1Password.  I eventually realized that my emails from 1Password addressed me using the first four characters of my email address, and it turns out this was my username.  

When folks are logging into the new forum it might be nice to tell them how to find their username and not to try to login using their email address. 

Also is their any way to change my username?  What 1Password created for me is not what I would have created.