Issue with httpContext and cascadingParamter in blazor web app

@code {
    [CascadingParameter]
    public HttpContext httpContext { get; set; }

    [SupplyParameterFromForm]
    public LoginViewModel Model { get; set; } = new();

    private string? errorMessage;

    private async Task Authenticate()
    {
        var userAccount = appDbContext.UserAccounts.Where(x => x.UserName == Model.UserName).FirstOrDefault();
        if(userAccount is null || userAccount.Password != Model.Password)
        {
            errorMessage = "Invalid User Name or Password";
            return;
        }

        var claims = new List<Claim>
        {
            new Claim(ClaimTypes.Name, Model.UserName),
            new Claim(ClaimTypes.Role, userAccount.Role)
        };

        var identity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
        var principal = new ClaimsPrincipal(identity);

        await httpContext.SignInAsync(principal);
        navigationManager.NavigateTo("/");

    }
}