Wrong Print Order With Web Request - ios

Question

I am trying to read data from Google Sheet API and get the last 5 rows. Here is my function:
func fetchData() {
let range = "TestSheet"
var convertedLogList : [Log] = []
var fetchResult: [[String]] = []
let query = GTLRSheetsQuery_SpreadsheetsValuesGet.query(withSpreadsheetId: Globals.shared.YOUR_SHEET_ID, range: range)
Globals.shared.sheetService.executeQuery(query) { (ticket, result, error) in
if let error = error {
print(error)
return
}
guard let values = (result as? GTLRSheets_ValueRange)?.values else {
print("No data found.")
return
}
fetchResult = values.map { $0.map { $0 as? String ?? "" } }
for row in fetchResult {
// convert [String] to a Log object
var log = Log()
log.timestamp = row[0]
log.nthTime = row[1]
log.openNew = row[2]
if row.count == 4 {
log.note = row[3]
}
convertedLogList.append(log)
}
print("===== convertedLogList: ", convertedLogList)
}
var latestLogs : [Log] = []
var counter = 0
// take the latest 5 logs
for log in convertedLogList.reversed() {
if counter < convertedLogList.count && counter < 5 {
counter += 1
latestLogs.append(log)
} else {
break
}
}
print("+++++ latestLogs: ", latestLogs)
}
I have 2 print statements in my code but the print order is wrong. Here is the print output:
+++++ latestLogs: []
===== convertedLogList: [Log(id: xxxxxxxxx, timestamp: "10/24/2022", nthTime: "1", openNew: "Yes", note: "), Log(id:xxxxxxx,....) .... ]
I wonder why the print order is wrong. How can I utilize the await with Google Sheet API in Swift to solve this issue?