Create a new Reseller

curl --request POST \
  --url https://partners.clerk.chat/reseller \
  --header 'Content-Type: application/json' \
  --data '{
  "username": "<string>",
  "password": "<string>",
  "externalId": "<string>",
  "companyName": "<string>"
}'

{
  "id": "<string>",
  "externalId": "<string>",
  "username": "<string>",
  "created": "2023-11-07T05:31:56Z",
  "updated": "2023-11-07T05:31:56Z"
}