Before you use the Content Control API for the first time:
As a one-time operation, you must create an OAuth2 client application of any flow type, which results in a set of client credentials for that application.
You use these client credentials to obtain an access token using the configured flow. This token may be used to access Aura APIs until it expires, at which point a new token must be obtained.
For detailed information about obtaining a token, see the "Managing OAuth2 Applications" section in the latest version of the Aura LCDN/LMS Administration Guide on the Aura LCDN and LMS product page on Akamai Control Center.