Error 'an object reference is required …' in instagram project

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C#

hi, i'm making a software that you can type the name and it'll search on instagram and scrape the info and show it to you . now, i want it to show the name and other things on a label but it says an object reference is required ... .
i get that error in "lbl_Name" and this is the code:

public static async void PullUserPosts(string usertoscrape)
        {
            IResult<InstaUser> UserSearch = await api.GetUserAsync(usertoscrape);
            lbl_Name.text($"USER: {UserSearch.Value.FullName}\n\tFollowers: {UserSearch.Value.FollowersCount} \n\tVerified {UserSearch.Value.IsVerified}");

            IResult<InstaMediaList> media = await api.GetUserMediaAsync(usertoscrape, PaginationParameters.MaxPagesToLoad(4));
            List<InstaMedia> mediaList = media.Value.ToList();

public partial class Form1 : Form
{
    private const string username = "";
    private const string password = "";

    private static UserSessionData user;

    private static IInstaApi api;


    private void Form1_Load(object sender, EventArgs e)
    {
        user = new UserSessionData();
        user.UserName = username;
        user.Password = password;

        Login();
        //lbl_Name.Text = $"USER: {UserSearch.Value.FullName}\n\tFollowers";
    }

    public Form1()
    {

        InitializeComponent();
    }

    private void Btn_Search_Click(object sender, EventArgs e)
    {



    }

    public static async void Login()
    {
        api = InstaApiBuilder.CreateBuilder()
            .SetUser(user)
            .UseLogger(new DebugLogger(LogLevel.Exceptions))
            .SetRequestDelay(TimeSpan.FromSeconds(8))
            .Build();


        var loginrequest = await api.LoginAsync();
        if (loginrequest.Succeeded)
        {
            MessageBox.Show("logged in");
            PullUserPosts("garyvee");
        }

        else
            MessageBox.Show("error logging in!\n" + loginrequest.Info.Message);
    }




    public static async void PullUserPosts(string usertoscrape)
    {
        IResult<InstaUser> UserSearch = await api.GetUserAsync(usertoscrape);
        lbl_Name.Text ($"USER: {UserSearch.Value.FullName}\n\tFollowers: {UserSearch.Value.FollowersCount} \n\tVerified {UserSearch.Value.IsVerified}");

        IResult<InstaMediaList> media = await api.GetUserMediaAsync(usertoscrape, PaginationParameters.MaxPagesToLoad(4));
        List<InstaMedia> mediaList = media.Value.ToList();


        for (int i = 0; i < mediaList.Count; i++)
        {
            InstaMedia m = mediaList[i];
            if (m != null && m.Caption != null)
            {
                string captiontext = m.Caption.Text;
                if (captiontext != null)
                {
                    if (m.MediaType == InstaMediaType.Image)
                    {
                        for (int x = 0; x < m.Images.Count; x++)
                        {
                            if (m.Images[x] != null && m.Images[x].URI != null)
                            {
                                MessageBox.Show($"\n\t{captiontext}\n\t");
                                string uri = m.Images[x].URI;

                                MessageBox.Show($"{uri}\n\t");

                            }
                        }
                    }
                }
            }
        }

    }


}

so what should i do to make it show the results in a label ?!
thank you.

What I have tried:

messagebox.show and it worked fine
but that's not what i want .