Continue execution of services in background while using app Xamarin Android

I have some data to insert in database when user login mobile app. As well as I have some other services calls too, which makes my app login worst. So here I want to know that how can I login immediately & continue execution of other data services in background.

However I am making async call which is doesn't seem to work. The service calls I am making is it running in background? or I can make it more batter

private async Task InsertPushKeys()
{       
    foreach (var item in SISConst.Mychildren)
    {
        pushInfo.OrganizationId = Convert.ToInt64(item.OrganizationID);
        pushInfo.OsType = "Android";
        pushInfo.ServerkeyPush = SISConst.LmgKey;
        var ignore = await logDAL.InsertPushInfo(pushInfo);
    }
}

Below line executing the service.

var ignore = await logDAL.InsertPushInfo(pushInfo);

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