OAuth endpoint to exchange your access key ID and access key secret for an access token.
grant_type=client_credentials&client_id=ack_clckqmmnyfiupexjew7shh5ahe&client_secret=Pmg36sDWQ9WxtPR3
{- "access_token": "2YotnFZFEjr1zCsicMWpAA",
- "token_type": "example",
- "expires_in": 3600
}