Device repository and cascase device delete on user delete

src/Core/Repositories/IDeviceRepository.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Bit.Core.Domains;
+
+namespace Bit.Core.Repositories
+{
+    public interface IDeviceRepository : IRepository<Device, Guid>
+    {
+        Task<Device> GetByIdAsync(Guid id, Guid userId);
+        Task<ICollection<Device>> GetManyByUserIdAsync(Guid userId);
+    }
+}