// We're using HttpContextBase to allow access to cookies.
public async Task <string> GetCartId(ClaimsPrincipal principal, CancellationToken cancellationToken = default)
{
string cartSessionValue = await _session.GetStringAsync(CART_SESSION_KEY, cancellationToken);
if (string.IsNullOrEmpty(cartSessionValue))
{
// Generate a new random GUID using System.Guid class
cartSessionValue = Guid.NewGuid().ToString();
await _session.SetStringAsync(CART_SESSION_KEY, cartSessionValue, cancellationToken);
}
return(cartSessionValue);
}