curl --request POST \
  --url https://app.myhero.so/document/invite-user \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "jsmith@example.com",
  "documentId": "<string>",
  "role": "owner"
}
'

{
  "data": {
    "invitationsSent": 123,
    "documentsInvited": 123,
    "usersInvited": 123
  }
}