added hashing and implemented it for the masterpassword on login

Project.Persistence/ShaHash.cs

@@ -0,0 +1,23 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Project.Persistence;
+public static class ShaHash
+{
+    public static string HashPassword(string password)
+    {
+        using (SHA256 sha256Hash = SHA256.Create())
+        {
+            // convert string to byte array and hash
+            byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(password));
+
+            // Byte-Array als Hex-String formatieren
+            StringBuilder builder = new StringBuilder();
+            foreach (var b in bytes)
+            {
+                builder.Append(b.ToString("x2")); // x2 = hex format
+            }
+            return builder.ToString();
+        }
+    }
+}

Project.View/NewLogin/NewLogin.axaml.cs

@@ -26,13 +26,13 @@ public partial class NewLogin : Window
         string username = NewLoginUsernameBox.Text?.Trim();
         string password = NewLoginPasswordBox.Text?.Trim();
         string email = NewLoginEmailBox.Text?.Trim();
-
-        var user = new Model.NewUser(username, password, email);
+        string hashedPassword = ShaHash.HashPassword(password);
+        var user = new Model.NewUser(username, hashedPassword, email);
         SQLite.SaveUser(user);
 
         Close();
-
     }
+    
     private void NewLoginCancelOnClick(object? sender, RoutedEventArgs e)
     {
         Close();