curl --request POST \
  --url https://api.tread-horizon.com/v1/sso_connections \
  --header 'Content-Type: application/json' \
  --data '
{
  "email": "jsmith@example.com"
}
'

{
  "data": [
    {
      "display_name": "<string>",
      "stytch_connection_id": "<string>",
      "start_url": "<string>"
    }
  ]
}