curl --request POST \
  --url https://api.topsort.com/public/v1/user-service/advertiser-users \
  --header 'Content-Type: application/json' \
  --data '{
  "email": "<string>",
  "familyName": "",
  "givenName": "",
  "languagePreference": "en",
  "vendorIds": [
    "<string>"
  ]
}'

{
  "email": "<string>",
  "familyName": "",
  "givenName": "",
  "languagePreference": "en",
  "userId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "vendorIds": [
    "<string>"
  ]
}