getting improper statement error when using invokeUrl

getting improper statement error when using invokeUrl

greetings

i created a custom connection with zoho expense and i wanted to start manipulating records in expense using the connection and the invokeUrl method..
my function looks like this:

  2. void createExpense()
  3. {
  4. data = Map();
  5. data.put("date","2022-12-01");
  6. data.put("account_id","3599281000000000445");
  7. data.put("amount",1000);
  8. data.put("paid_through_account_id","3599281000000000361");
  9. data.put("description","Salary payment for employee Test Employee");
  10.   response = invokeUrl
  11.   [
  12.   url : https://expense.zoho.com/api/v1/expenses
  13.   type : POST
  14.   parameters : data
  15. headers: "Content-type:application/json"
  16.   connection : "test_expense_connection"
  17.   ]
  18. }

but when i try to save my function before running it i keep getting the improper statement error on line 9 where i'm using the invokeUrl. what am i doing wrong? what's causing this?

Thanks