feat: added getmd5hash func into TheManager

Signed-off-by: limited_dev <loginakkisativ@gmail.com>

ImageBoardServerApp/Util/TheManager.cs

@@ -1,3 +1,4 @@
+using System.Security.Cryptography;
 using ImageBoardServerApp.Data;
 using ImageBoardServerApp.Data.Repository;
 
@@ -93,4 +94,15 @@ public class TheManager
     {
         return await CommentsRepository.getCommentByGETAsync(board, GET) != null;
     }
+
+    public static string getmd5Hash()
+    {
+        var bytes = new byte[16];
+        using (var rng = new RNGCryptoServiceProvider())
+        {
+            rng.GetBytes(bytes);
+        }
+        
+        return BitConverter.ToString(bytes).Replace("-", "").ToLower();
+    }
 }