You can only disable password authentication if you set up your account to use single sign-on credentials. Otherwise, password authentication is required and cannot be modified.
Sign in to DigiCert ONE.
Navigate to the Manager menu icon (), select Account.
In the left navigation menu, select Accounts.
On the Accounts page, select the Name of the account.
On the Account details page, in the Sign-in settings for all-account-access users section, the Password only pencil (edit icon).
On the Manage password only page, select Disable standard sign-in (for accounts with alternate sign-in methods configured).
Select Save.