[PM-21612] [Unified] Fix unhandled error when editing an invited member (#5817)

* Check for UserId instead of passing potentially default value to
  bump account revision date method.

* Pass explicit UserId into CipherRepository.CreateAsync method
  used for imports.

src/Core/Tools/ImportFeatures/ImportCiphersCommand.cs

@@ -115,7 +115,7 @@ public class ImportCiphersCommand : IImportCiphersCommand
         }
 
         // Create it all
-        await _cipherRepository.CreateAsync(ciphers, newFolders);
+        await _cipherRepository.CreateAsync(importingUserId, ciphers, newFolders);
 
         // push
         await _pushService.PushSyncVaultAsync(importingUserId);