Support manage.py's createsuperuser command

[payton]

python3 manage.py createsuperuser currently fails after inputting an Ethereum address with:

TypeError: __init__() missing 1 required positional argument: 'message'

[pconerly]

@payton you might wanna look at my previous attempt here:
https://github.com/NorthwestNFTs/django-siwe-auth/commits/createsuperuser_override