POST /domain/create.x-api-key: ********************curl --location 'https://mailleader.com.br/api/v1/domain' \
--header 'x-api-key: <api-key>' \
--header 'Content-Type: application/json' \
--data '{
"domain": "empresa.com.br",
"outboundPurpose": "transactional"
}'