.USERNAME The username of the user to modify.
.EMAIL The email address of the user.
.IS_ADMIN Should be 1 if the user is admin, otherwise 0.
.LICENSE_ID The license of the user.

>Edits a user definition.

!For the given username, set the email, admin flag and license ID
$$ damiank damiank@acme.com 0 XX-XXXX-XXXX-XX
