Allow different "admin" user

[Raul P.]

Hi,

Not sure if this is possible, but since we already have a --adminpassword flag, can we also please have a --adminuser as well?
The goal if possible, is not to create the "admin" username at all, and instead use our own admin username.

Thank you

[E.L.]

Done, the changes have been pushed in the commit
Feel free to give it a try.

[Raul P.]

Thanks, this works great!