Generates an OAuth2 access token using the Client Credentials flow.
Unique identifier of the API client issued during registration
1 - 128"5gtyhu78ujmlko90iikmjunbh"
"1example23456789abcdefghijk"
Secret key associated with the client_id, used to authenticate the client
1 - 64"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ+/="