AWS Workspace users are managed in Active Directory. In production configurations users are pulled from Active DIrectory into Okta
To pull users from Active directory:
In a browser, Navigate to your Okta Org and Login as an Administrator.
Click Directory > Directory Integrations.
Click Add Active Directory.
Click Setup Active Directory.
Complete the wizard as required.
Note: For more information about integrating Active Directory with your Okta tenant see Manage your Active Directory integration.