Need help on adding new user ID/Login to Aster Lens portal

Aster

Need help on adding new user ID/Login to Aster Lens portal

I am new to Aster lens portal currently all the users are logging to portal using  admin as common login. We would like to create new users/login  for each individual users instead of using comon login. 

Can you guys please let us know what's process/steps of creating new IDs for aster lens portal. Thanks in advance.