input: Write a python function to format the current date and time in the "dd/mm/yyyy, hh:mm:ss" format.
  assert format_current_datetime(datetime.datetime(2023, 10, 1, 14, 30, 0)) == "01/10/2023, 14:30:00"
  assert format_current_datetime(datetime.datetime(2022, 5, 15, 9, 5, 5)) == "15/05/2022, 09:05:05"
  assert format_current_datetime(datetime.datetime(2020, 12, 31, 23, 59, 59)) == "31/12/2020, 23:59:59"
output: def format_current_datetime(dt):
      return dt.strftime("%d/%m/%Y, %H:%M:%S")