cleanning

BookAStar/BookAStar/Helpers/UserHelpers.cs

@@ -1,12 +1,7 @@
 using System;
-using System.Collections.Generic;
-using System.Diagnostics;
 using System.Globalization;
 using System.IO;
-using System.Linq;
 using System.Net.Http;
-using System.Text;
-using System.Text.RegularExpressions;
 using System.Threading.Tasks;
 using Xamarin.Forms;