如何阻止同步方法在异步调用之前加速

我有一个形式为的类构造函数:

protected LoginFunctions(){…..}

在此函数中,我使用以下方法调用异步函数:

var tsk = Task.Run(async () => await PrePopulateLogin());

我的问题是,当构造函数退出时,预填充登录函数仍在运行。如何更改我的代码,使构造函数在预填充登录完成后才退出?

预填充登录必须是异步的。

private async Task PrePopulateLogin()
    {
        var vector = await JSRuntime.Current.InvokeAsync<string>("blazorExtensions.ReadCookie", "vector");
        var secureNextLogon = await JSRuntime.Current.InvokeAsync<string>("blazorExtensions.ReadCookie", "SecureNextLogon");

        if (secureNextLogon != null)
        {
            var encryptor = new AesEncryptor(SecurityConstants.SecurityKey, Convert.FromBase64String(vector));
            var decryptedValue = encryptor.Decrypt(secureNextLogon);
            var email = decryptedValue.Split(' ')[0].Substring(6);
            var password = decryptedValue.Split(' ')[1].Substring(9);
            var rememberMe = decryptedValue.Split(' ')[2].Substring(11);
            if (rememberMe == "True")
            {

                UserModel.EmailAddress = email;
                UserModel.Password = password;
                UserModel.RememberUser = true;
            }
        }
    }