public Users signin(string user, string password)
 {
     try
     {
         var qry = Users.FirstOrDefault(u => u.UserName.Equals(user));
         if (qry == null)
         {
             return(null);
         }
         if (AppHash.PasswordValid(password, qry.Password))
         {
             return(qry);
         }
         return(null);
     }
     catch
     {
         return(null);
     }
 }
 public string getHash(string pass)
 {
     return(AppHash.PasswordHash(pass));
 }