public async Task <PageResult> OnPost(string userId)
    {
        var EmailToUnsubscribe = await GetEmail(userId);

        try
        {
            await _paymentHandlerSubscription.CancelSubscriptionAtPeriodEnd(EmailToUnsubscribe);

            Message = $"{NameToUnsubscribe} has been unsubscribed from DevBetter. They will retain access until the end of their subscription period.";
            return(Page());
        }
        catch
        {
            Message = "Attempt to cancel subscription failed.";
            return(Page());
        }
    }
    public async Task <PageResult> OnPost()
    {
        var user = await _userManager.GetUserAsync(User);

        var email = user.Email;

        try
        {
            await _paymentHandlerSubscription.CancelSubscriptionAtPeriodEnd(email);

            Message = "You have been unsubscribed from DevBetter. You will retain access until the end of your subscription period.";
            return(Page());
        }
        catch
        {
            Message = "Attempt to cancel subscription failed.";
            return(Page());
        }
    }