curl --request DELETE \
  --url https://api.vantage.sh/v2/budgets/{budget_token} \
  --header 'Authorization: Bearer <token>'

{
  "token": "<string>",
  "name": "Acme123 Budget",
  "workspace_token": "<string>",
  "user_token": "<string>",
  "created_by_token": "<string>",
  "cost_report_token": "<string>",
  "created_at": "2024-03-19T00:00:00Z",
  "budget_alert_tokens": [
    ""
  ],
  "child_budget_tokens": [
    ""
  ],
  "periods": [
    {
      "start_at": "2024-03-19T00:00:00Z",
      "end_at": "2024-03-19T00:00:00Z",
      "amount": "100.00"
    }
  ],
  "performance": [
    {
      "date": "2024-03-19T00:00:00Z",
      "actual": "2024-03-19T00:00:00Z",
      "amount": "100.00"
    }
  ]
}