Token Endpoint in Swagger Doco

Hi All,

Trying to find out some more information on the token endpoint (/api/auth/oauth/token) I want to add transaction items from a ticketing system however i am only able to make Post requests and such can’t request an auth token each time. Is it possible to use this to create long life token that just has the access required to create transactions. Not sure where to get client_id and so on. Cheers in advance, image attached for more context