curl --request POST \
  --url https://api.gcore.com/iam/admin/sellers \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "email": "jsmith@example.com",
  "full_name": "<string>",
  "phone": "<string>"
}'

{
  "id": 123,
  "email": "jsmith@example.com",
  "full_name": "<string>",
  "phone": "<string>",
  "reseller_name": "<string>",
  "company": "<string>",
  "date_joined": "<string>",
  "activated": true,
  "deleted": true
}