When using the SSO feature of Google G Suite, the users must have an account before they can successfully login to the Google G Suite domainBefore people on your team can sign in and use your organization's Google services, they need a user account. There are several methods to provision the users to Google G Suite:
- Manual. An administrator can manage users through Google G Suite administrative interface. See The easiest way to add user accounts is to add them individually in the Google Admin Console. Read this Google G Suite support page.
- Upload of CSV file (see this Google G Suite support page)
- LDAP synchronisation using Google Cloud Directory Sync utility (see this Google G Suite support page)
- for more on this.
- If you have many users, you can add their accounts all at once from a spreadsheet or CSV-file. Read this page for an overview.
- On that page you will also find a way to use LDAP synchronisation.
- If you are keen on using API's, try Google G Suite Provisioning API which you can find hereGoogle G Suite Provisioning API (see this Google G Suite support page).