XF 2.2 Username changes - only allow once?



Is there a good way of configuring Xenforo to only allow 1 name change? I read that the "Minimum time between username changes", also applies to newly registered users, ergo, this time duration would need to elapse before the user could change their username initially so if you set this to a really high value, (to prevent people from changing it more than once), they may not ever have the option.

I did read a suggestion for adding in a "Max username changes" field, which I think would be very valuable and address the above. In the absence of that, is there a workaround for this that can be used in the interim?

Thank you