The following links help you understand how to onboard a user without SSO configuration:
Once the Add request is processed, a welcome mail is sent to the user to login to Smart Cloud Portal using the unique login name generated by the Smart Cloud service. The unique login name looks as follows:
ACME01P.KJohn@smartplantcloud.net
The first part reflects the Estate name followed by the combination of last name and first name of the user.
The user logs in to Smart Cloud Portal using the login name ACME01P.KJohn@smartplantcloud.net. For more information, see How does non-SSO authentication work?