Get Expense

curl --request GET \
  --url https://server26-dot-royalti-project.uc.r.appspot.com/expense/{id} \
  --header 'Authorization: Bearer <token>'

{
  "message": "Expense retrieved successfully",
  "expense": {
    "id": "expense-uuid-123",
    "title": "Mavins sabi girl",
    "type": "product",
    "amount": 100,
    "amountUSD": 100,
    "currency": "USD",
    "conversionRate": 1,
    "transactionDate": "2023-03-14",
    "memo": "Some memo",
    "createdAt": "2023-03-14T10:30:00.000Z",
    "updatedAt": "2023-03-14T10:30:00.000Z"
  }
}