curl --request GET \
  --url https://api.aimtell.com/prod/welcome-notifications/{id}/results \
  --header 'X-Authorization-Api-Key: <api-key>'

{
  "sent": {
    "03/05/2017": 0,
    "03/06/2017": 0,
    "03/07/2017": 0,
    "03/08/2017": 0,
    "03/09/2017": 0
  },
  "delivered": {
    "03/05/2017": 0,
    "03/06/2017": 0,
    "03/07/2017": 0,
    "03/08/2017": 0,
    "03/09/2017": 0
  },
  "bounced": {
    "03/05/2017": 0,
    "03/06/2017": 0,
    "03/07/2017": 0,
    "03/08/2017": 0,
    "03/09/2017": 0
  },
  "clicked": {
    "03/05/2017": 0,
    "03/06/2017": 0,
    "03/07/2017": 0,
    "03/08/2017": 0,
    "03/09/2017": 0
  },
  "conversions": {
    "03/05/2017": 0,
    "03/06/2017": 0,
    "03/07/2017": 0,
    "03/08/2017": 0,
    "03/09/2017": 0
  }
}