Ways to import users into Appian?

In either of the ways, you will need a Process Model that creates User accounts in the environment.
1. For database approach - you will need to export into a CSV, import into a database table that suits the CSV structure, create a process which actually queries the database and creates user accounts. This way, you will have a database copy/reference for future purpose.
2. if you don't need a database copy/reference - Just extract the CSV, Create a process which actually can read the CSV that you have provided, extract the user respective details into PVs through which you can configure the details to User Creation smart service.

In either of the ways, you will need a Process Model that creates User accounts in the environment.
1. For database approach - you will need to export into a CSV, import into a database table that suits the CSV structure, create a process which actually queries the database and creates user accounts. This way, you will have a database copy/reference for future purpose.
2. if you don't need a database copy/reference - Just extract the CSV, Create a process which actually can read the CSV that you have provided, extract the user respective details into PVs through which you can configure the details to User Creation smart service.