Log in to the Controller as an administrator and navigate to Settings > Administration > Authentication Provider. See LDAP for On-Premises Deployments or Configure Basic SAML On-Premises Authentication.

Select the API Clients tab to create an API Client. You can use the API Client to provide secure access to the Controller through REST API calls. See API Clients.

Authentication settings in the Controller are specific to an account within the Controller. If you have a multi-tenant on-premises Controller, you must configure authentication settings for each account individually.