public async Task ReceiveAsync(AuthenticationTokenReceiveContext context) { var allowedOrigin = context.OwinContext.Get <string>("ta:clientAllowedOrigin"); context.OwinContext.Response.Headers.Add("Access-Control-Allow-Origin", new[] { allowedOrigin }); string hashedTokenId = Helper.GetHash(context.Token); using (AuthenticationRepository _repo = new AuthenticationRepository()) { var refreshToken = await _repo.FindRefreshToken(hashedTokenId); if (refreshToken != null) { context.DeserializeTicket(refreshToken.ProtectedTicket); var result = await _repo.RemoveRefreshTokenByID(hashedTokenId); } } }