Probably super trivial - re-arrange user sign up / login elements

I’m sure this is child’s play but I haven’t been able to find a simple solution.

If you’ve added a custom element (say “username”) to a sign up form using the standard Meteor accounts-base packages, how do you rearrange their display order on the form?

Right now I get :

- email
- password
- username

But I would like :

- username
- email
- password

Is there a template override or something that can be used?