curl --request GET \
  --url https://api.vantage.sh/v2/budget_alerts \
  --header 'Authorization: Bearer <token>'

{
  "budget_alerts": [
    {
      "token": "<string>",
      "budget_tokens": [
        ""
      ],
      "created_at": "2024-03-19T00:00:00Z",
      "workspace_token": "<string>",
      "user_tokens": [
        ""
      ],
      "duration_in_days": 123,
      "threshold": 75,
      "period_to_track": "start_of_the_month",
      "recipient_channels": [
        ""
      ],
      "user_token": "<string>",
      "integration_provider": "slack"
    }
  ],
  "links": {
    "self": "<string>",
    "first": "<string>",
    "next": "<string>",
    "last": "<string>",
    "prev": "<string>"
  }
}