If you want to use Security Assertion Markup Language (SAML) authentication, but do not have your own Active Directory (AD) deployed, you can provision Google G Suite as your company's SAML Identity Provider (IdP).
STEP 1 - Google G Suite SAML Configuration
After you complete the G Suite application setup wizard, G Suite displays a settings page.
Click the three dot menu in the top right and select ON for everyone to enable SAML authentication for all users.
STEP 2 - Federate G Suite With the Web Security Service Portal