Blank passwords no longer result in "heightheightheightheight"

Try/Catch around login function

TShockAPI/Commands.cs

@@ -303,7 +303,8 @@ namespace TShockAPI
                 args.Player.SendMessage("If you forgot your password, there is no way to recover it.");
                 return;
             }
-
+            try
+            {
                 string encrPass = Tools.HashPassword(args.Parameters[1]);
                 string[] exr = TShock.Users.FetchHashedPasswordAndGroup(args.Parameters[0]);
                 if (exr[0].ToUpper() == encrPass.ToUpper())
@@ -321,6 +322,12 @@ namespace TShockAPI
                     args.Player.LoginAttempts++;
                     return;
                 }
+            } catch (Exception e)
+            {
+                args.Player.SendMessage("There was an error processing your request. Maybe your account doesn't exist?", Color.Red);
+                return;
+            }
+
         }
 
         //Todo: Add separate help text for '/user add' and '/user del'. Also add '/user addip' and '/user delip'

TShockAPI/Tools.cs

@@ -500,6 +500,10 @@ namespace TShockAPI
         {
             using (var sha = new SHA512CryptoServiceProvider())
             {
+                if (password == "")
+                {
+                    return "nonexistent-password";
+                }
                 var bytes = sha.ComputeHash(Encoding.ASCII.GetBytes(password));
                 return bytes.Aggregate("", (s, b) => s + b.ToString("height"));
             }