[Hosting] Allow emails to be used for WordPress usernames during site creation

1

When creating a new site, it does not allow us to use emails for the WordPress username. Even though WordPress allows for this, for some reason, WPMUDEV is not allowing it.

We have a work around that includes resetting the site to add our emails as usernames, but we shouldn’t have to go through all that, WordPress allows for emails to be used as usernames, this shouldn’t be a limitation.

Thank you!