public async Task CreateAsync(AuthenticationTokenCreateContext context) { var userId = context.Ticket.Properties.Dictionary["userId"]; if (string.IsNullOrEmpty(userId)) { return; } var refreshTokenId = Guid.NewGuid().ToString("n"); using (var repo = new MyDbContext()) { var refreshTokenLifeTime = api.Utils.Configuration.RefreshTokenExpireTimeMinutes; var token = new RefreshToken() { IssuedUtc = DateTime.UtcNow, ExpiresUtc = DateTime.UtcNow.AddMinutes(Convert.ToDouble(refreshTokenLifeTime)), Token = refreshTokenId, UserId = userId }; context.Ticket.Properties.IssuedUtc = token.IssuedUtc; context.Ticket.Properties.ExpiresUtc = token.ExpiresUtc; token.ProtectedTicket = context.SerializeTicket(); var result = await repo.AddRefreshToken(token); if (result) { context.SetToken(refreshTokenId); } } }