curl --request POST \
  --url https://api-payment.lab4pay.com/v1/auth/token/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "grant_type": "client_credentials",
  "client_id": "<string>",
  "client_secret": "<string>"
}
'

{
  "access_token": "<string>",
  "expires_in": "<string>",
  "token_type": "Bearer",
  "scope": "default"
}