curl --location --request POST 'https://api.sandbox.supersign.com.br/v4/api/envelopes//participants//reminder' \
--header 'Idempotency-Key;' \
--header 'Authorization: Bearer <token>'{
"error": {
"code": "IDEMPOTENCY_KEY_REQUIRED",
"message": "Idempotency-Key header is required"
}
}