curl --request POST \
  --url https://api.vantage.sh/v2/report_notifications \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "title": "<string>",
  "cost_report_token": "<string>",
  "frequency": "<string>",
  "change": "<string>",
  "workspace_token": "<string>",
  "user_tokens": [
    "<string>"
  ],
  "recipient_channels": [
    "<string>"
  ]
}
'

{
  "token": "rprt_ntfctn_8ce31b43a149cd2e",
  "title": "New Report Notification",
  "cost_report_token": "rprt_933010600676b02f",
  "user_tokens": [
    "usr_45e7d17e9f402226"
  ],
  "frequency": "daily",
  "change": "percentage"
}