curl --request POST \
  --url https://api.kordio.io/oauth/token \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data grant_type=client_credentials

{
  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "token_type": "Bearer",
  "expires_in": 3600,
  "scope": "ledger:read ledger:write"
}