Index: ChapterX.Domain/Repositories/ICollaborationRepository.cs
===================================================================
--- ChapterX.Domain/Repositories/ICollaborationRepository.cs	(revision 73b69b22fa1e9888b8530a66db4a150efb8f52bc)
+++ ChapterX.Domain/Repositories/ICollaborationRepository.cs	(revision d300631ac3354730c3b03cb7b160974af50e7894)
@@ -5,4 +5,5 @@
     public interface ICollaborationRepository : IRepository<Collaboration>
     {
+        Task<bool> DeleteByUserAndStoryAsync(int userId, int storyId, CancellationToken cancellationToken = default);
     }
 }