curl --request POST \
  --url https://platform.uat.proveapis.com/token \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data client_id=customer_id \
  --data client_secret=secret \
  --data grant_type=client_credentials

{
  "access_token": "eyJ...",
  "refresh_token": "eyJ...",
  "refresh_expires_in": 3600,
  "token_type": "Bearer",
  "expires_in": 3600
}