Handle DbContext and IDbContextFactory<T> lifetime in Blazor InteractiveServer

    protected override async Task OnInitializedAsync()
    {
        _user = await UserAccessor.GetRequiredUserAsync(HttpContextAccessor.HttpContext!);
        _username = await UserManager.GetUserNameAsync(_user);
        _phoneNumber = await UserManager.GetPhoneNumberAsync(_user);

        Input.PhoneNumber ??= _phoneNumber;
        Input.IsAdult = _user.IsAdult;
    }

@inject IDbContextFactory<ApplicationDbContext> DbContextFactory

        if (Input.IsAdult != _user.IsAdult)
        {
            await using (ApplicationDbContext dbContext = DbContextFactory.CreateDbContext())
            {
                ApplicationUser dbUser = await dbContext.Users.SingleAsync(dbUser => dbUser.Id == _user.Id);
                dbUser.IsAdult = Input.IsAdult;
                await dbContext.SaveChangesAsync();
            }
        }

An unhandled exception has occurred while executing the request.
      System.InvalidOperationException: A second operation was started on this context instance before a previous operation completed. This is usuall
y caused by different threads concurrently using the same instance of DbContext. For more information on how to avoid threading issues with DbContext, see https://go.microsoft.com/fwlink/?linkid=2097913.
         at Microsoft.EntityFrameworkCore.Infrastructure.Internal.ConcurrencyDetector.EnterCriticalSection()
         at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.MoveNextAsync()
         at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken)
         at Microsoft.EntityFrameworkCore.Query.ShapedQueryCompilingExpressionVisitor.SingleOrDefaultAsync[TSource](IAsyncEnumerable`1 asyncEnumerable, CancellationToken cancellationToken)
         at XXXXXXXXXXXXX.Components.Account.IdentityUserAccessor.GetRequiredUserAsync(HttpContext context) in C:\XXXXXXXXXXXXX\Components\Account\IdentityUserAccessor.cs:line 12
         at XXXXXXXXXXXXX.Components.Account.Pages.Manage.Index.OnInitializedAsync() in C:\XXXXXXXXXXXXX\Components\Account\Pages\Manage\Index.razor:line 63

internal sealed class IdentityUserAccessor(
    UserManager<ApplicationUser> userManager,
    IdentityRedirectManager redirectManager)
{
    public async Task<ApplicationUser> GetRequiredUserAsync(HttpContext context)
    {
        var user = await userManager.GetUserAsync(context.User);

        if (user is null)
        {
            redirectManager.RedirectToWithStatus("Account/InvalidUser",
                $"Error: Unable to load user with ID '{userManager.GetUserId(context.User)}'.", context);
        }

        return user;
    }
}