Xamarin Forms execution returns from await Httpclient PostAsync

I am calling a methodgetaddress(); inside viewmodel for getting address information from API. But while debugging, execution returns at var response = await client.PostAsync(base_url + "api_delivery_details", formcontent).ConfigureAwait(false);to the calling method getaddress() but executes the remaining portion later.so getting null result. How to execute all from first time?

public async void Get_branch_products()
    {
        RestClient restClient = new RestClient();            
        getaddresses();  //this is the calling method

        long delivery_fee1 = long.Parse(delivery_fee);
        GrandTotal = Total + (Total * Tax) / 100 + delivery_fee1 ;            
        OnPropertyChanged("GrandTotal");
        tax_amt = (Total * Tax) / 100;
        OnPropertyChanged("tax_amt");
    }

public async void getaddresses()
    {
        ind_vis = true;
        OnPropertyChanged("ind_vis");             
        int user_id = (int)App.Current.Properties["user_id"];
        RestClient restClient = new RestClient();
        var result = await restClient.Get_address(user_id);  //calling restAPI method

        if (result.status == "success")
        {
            ind_vis = false;
            OnPropertyChanged("ind_vis");

public async Task<Address> Get_address(int user_id)
    {
        var formcontent = new FormUrlEncodedContent(new[]
        {
           new KeyValuePair<string,string>("user_id",user_id.ToString())
        });
  //returns from here// var response = await client.PostAsync(base_url + "api_delivery_details", formcontent).ConfigureAwait(false); 
  //executes later// var result = await response.Content.ReadAsStringAsync();
        var Items = JsonConvert.DeserializeObject<Address>(result);
        return Items;
    }