public void OnPostExport()
{
var Context = new DbContextOptionsBuilder <ApplicationDbContext>()
.UseSqlite(CreateInMemoryDatabase())
.Options;
//arrange
var UserID = UserManager.GetUserId(User);
var pageModel = new DashboardModel(Context, Configuration, AuthorizationService, UserManager);
//assert
Assert.NotNull(pageModel.OnPostExportAsync());
}