I need to change my user name

I created the account a long time ago. This is solely used for my nonprofit and I need a user name that people will know is from our group. 

Please change it to AIUnited  

We should be very glad to help you with this. Kindly let us know the username you want us to change the account for and we will do it for you.

Thank you.

The account is cah932011 using this email address.
Can make it AIUnited instead?
Thanks!
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Hi, I see that your account username has already been changed? Please check and get back to us if that's still not the case. Thanks.