public void Create(AuthenticationTokenCreateContext context) { var clientid = context.Ticket.Properties.Dictionary["as:client_id"]; if (string.IsNullOrEmpty(clientid)) { return; } var refreshTokenId = Guid.NewGuid().ToString("n"); IClientService _repo = new ClientService(); var refreshTokenLifeTime = context.OwinContext.Get <string>("as:clientRefreshTokenLifeTime"); var token = new RefreshToken() { TokenID = refreshTokenId, ClientId = clientid, Subject = context.Ticket.Identity.Name, IssuedUtc = DateTime.UtcNow.ToEpochTime(), ExpiresUtc = DateTime.UtcNow.AddDays(Convert.ToDouble(refreshTokenLifeTime)).ToEpochTime() }; context.Ticket.Properties.IssuedUtc = token.IssuedUtc.ToDateTimeOffsetFromEpoch(); context.Ticket.Properties.ExpiresUtc = token.ExpiresUtc.ToDateTimeOffsetFromEpoch(); token.ProtectedTicket = context.SerializeTicket(); var result = _repo.AddRefreshToken(token); if (result) { context.SetToken(refreshTokenId); } }