I am trying to do a synchronous request using `Alamofire`. I have looked on Stackoverflow and found this question: [making an asynchronous alamofire request synchronous](https://stackoverflow.com/questions/36845356/making-an-asynchronous-alamofire-request-synchronous).

I saw that the accepted answer uses `completion` to make `Alamofire` request synchronous but I cannot make it to work. This is my simplified code:

```
func loadData(completion: (Bool)) -> (Int, [String], [String], [String]){

    Alamofire.request(url!, method: .get, parameters: nil, encoding: JSONEncoding.default, headers: nil).responseJSON { response in

        switch(response.result) {
        case .success(_):
            if let JSON = response.result.value as! [[String : AnyObject]]!{
                 //Here I retrieve the data
            }

            completion(true)
            break

        case .failure(_):
            print("Error")
            completion(false)
            break  
        }
   }

   return (numberRows, nameArray, ageArray, birthdayArray)
}

```

With this code I am getting an error when trying to make `completion(bool value)`. The error that I am getting is the following:

> 
> Cannot call value of non-function type 'Bool'
> 
> 
> 

I have tried using a lot of examples using completion to get the values synchronously (because I need to retrieve the data before to show it on a table and at the same time get the number of rows of that table) without success.

How can I use that completion to get a synchronous response?

Thanks in advance!