func generateUser() {
        self.IDName.stringValue = "..."
        self.IDStreet.stringValue = "..."
        self.IDCity.stringValue = "..."
        self.IDMail.stringValue = "..."
        self.IDPhone.stringValue = "..."
        self.IDFirstname.stringValue = "..."
        self.IDUsername.stringValue = "..."
        self.IDPassword.stringValue = "..."
        self.IDNationality.stringValue = "..."


        let requestURL: NSURL = NSURL(string: "https://randomuser.me/api")! // API URL: A free, open-source API for generating random user data.
        let urlRequest: NSMutableURLRequest = NSMutableURLRequest(URL: requestURL)
        let session = NSURLSession.sharedSession() // Singleton session based on default configuration
        let task = session.dataTaskWithRequest(urlRequest) {
            (data, response, error) -> Void in

            let httpResponse = response as! NSHTTPURLResponse
            let statusCode = httpResponse.statusCode // The receiver’s HTTP status code.

            if (statusCode == 200) {
                print("File download successfull.")

                let getData: NSData = data!

                let json = JSON(data: getData) // Retrieving data from the JSON file

                let priority = DISPATCH_QUEUE_PRIORITY_DEFAULT
                dispatch_async(dispatch_get_global_queue(priority, 0)) {
                    dispatch_async(dispatch_get_main_queue()) {
                        if var lastname = json["results"][0]["name"]["last"].string {
                            lastname.replaceRange(lastname.startIndex...lastname.startIndex, with: String(lastname[lastname.startIndex]).capitalizedString) // Capitalize only the first letter
                            self.IDName.stringValue = lastname // Label takes variable's value
                            print(lastname)
                        }
                        if var firstname = json["results"][0]["name"]["first"].string {
                            firstname.replaceRange(firstname.startIndex...firstname.startIndex, with: String(firstname[firstname.startIndex]).capitalizedString) // Capitalize only the first letter
                            self.IDFirstname.stringValue = firstname
                            print(firstname)
                        }
                        if let nationality = json["results"][0]["nat"].string {
                            self.IDNationality.stringValue = nationality
                            print(nationality)
                        }
                        if let street = json["results"][0]["location"]["street"].string {
                            self.IDStreet.stringValue = street
                            print(street)
                        }
                        if var city = json["results"][0]["location"]["city"].string {
                            city.replaceRange(city.startIndex...city.startIndex, with: String(city[city.startIndex]).capitalizedString) // Capitalize only the first letter
                            self.IDCity.stringValue = city
                            print(city)
                        }
                        if let mail = json["results"][0]["email"].string {
                            self.IDMail.stringValue = mail
                            print(mail)
                        }
                        if let phone = json["results"][0]["phone"].string {
                            self.IDPhone.stringValue = phone
                            print(phone)
                        }
                        if let username = json["results"][0]["login"]["username"].string {
                            self.IDUsername.stringValue = username
                            print(username)
                        }
                        if let password = json["results"][0]["login"]["password"].string {
                            self.IDPassword.stringValue = password
                            print(self.IDPassword.stringValue)
                        }
                        if let picture = json["results"][0]["picture"]["large"].string {
                            print(picture)
                            let pictureURL = NSURL(string: picture) // Image link
                            if let pictureData = NSData(contentsOfURL: pictureURL!){
                                self.IDPicture.image = NSImage(data: pictureData)
                            }
                        }
                        else {
                            print("Il n'y a pas de personne disponible")
                        }
                    }
                }
            }
        }

        task.resume() // Execute this task

    }