premium required for attachment download

src/App/Pages/Vault/VaultViewLoginPage.cs

@@ -277,8 +277,14 @@ namespace Bit.App.Pages
 
         private async Task OpenAttachmentAsync(Login login, VaultViewLoginPageModel.Attachment attachment)
         {
-            // 20 MB warning
-            if(attachment.Size >= 20971520 && !(await _userDialogs.ConfirmAsync(
+            if(!_tokenService.TokenPremium && !login.OrganizationUseTotp)
+            {
+                _userDialogs.Alert(AppResources.PremiumRequired);
+                return;
+            }
+
+            // 10 MB warning
+            if(attachment.Size >= 10485760 && !(await _userDialogs.ConfirmAsync(
                     string.Format(AppResources.AttachmentLargeWarning, attachment.SizeName), null,
                     AppResources.Yes, AppResources.No)))
             {

src/App/Resources/AppResources.Designer.cs

@@ -1771,6 +1771,15 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to A premium membership is required to use this feature..
+        /// </summary>
+        public static string PremiumRequired {
+            get {
+                return ResourceManager.GetString("PremiumRequired", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to bitwarden keeps your vault automatically synced by using push notifications. For the best possible experience, please select &quot;Ok&quot; on the following prompt when asked to enable push notifications..
         /// </summary>

src/App/Resources/AppResources.resx

@@ -962,4 +962,7 @@
   <data name="DisableAutoTotpCopy" xml:space="preserve">
     <value>Disable Automatic TOTP Copy</value>
   </data>
+  <data name="PremiumRequired" xml:space="preserve">
+    <value>A premium membership is required to use this feature.</value>
+  </data>
 </root>