Sauce Labs requires Identity Provider (IdP) initiated Single Sign-On (SSO), which means you will need to log in to your identity provider instance (for example, Okta) to access the Sauce Labs web application for the first time. This will either log you into a newly created Sauce account (with Just-in-Time provisioning, if enabled) or log you into your existing Sauce account.
After this initial login, you will no longer need to go through your identity provider instance again, as your Sauce logged-in session will remain active for the next 30 days. After 30 days, you will need to refresh you Sauce Labs login by logging in through you IdP again.