curl --request POST \
  --url https://identity-sandbox.payven.com.tr/api/v1/auth/{slug}/register \
  --header 'Content-Type: application/json; ver=1.0' \
  --data '
{
  "first_name": "<string>",
  "last_name": "<string>",
  "email": "<string>",
  "company_name": "<string>",
  "password": "<string>"
}
'

{
  "user_id": "<string>",
  "email": "<string>"
}