Add users without registration and SMTP server

Hello, i am new user to BitWarden and i use official Docker release w/bitwarden.sh script to rebuild, start, etc. My PC is running latest Arch linux and latest Docker Desktop.

I don’t have Any SMTP servers and i can’t register any accounts without it. I know there is a thing named ‘Admin panel’ but it needs SMTP server too.

Is there any way to manually add a user? Or, any ideas on how to setup SMTP server? (I Googled much about it but no luck)