Unity3d Set Player Icons By Script

Question

I'm trying to set My Player Icons by script, but when I run the script it does nothing, and I'm not getting any errors. This is my code:

public void SetPlayerIcons()
{
    var iconSizes = PlayerSettings.GetIconSizesForTargetGroup(BuildTargetGroup.iOS);
    var icons = new Texture2D[iconSizes.Length];

    for (var i = 0; i < iconSizes.Length; i++)
    {
        var iconPath = Path.Combine("Assets", BookIconsPath);
        var assetPath = iconPath+"/Icon_"+iconSizes[i]+".png";  
        Debug.Log("assetPath: "+assetPath);
        try 
        {
            icons[i] = AssetDatabase.LoadAssetAtPath<Texture2D>(assetPath);
            if (icons[i] == null)
                Debug.LogError("Unable to load icon at "+ assetPath+" due to asset not found");
        }
        catch (System.Exception e) 
        {
            Debug.LogError("Unable to load icon at "+ assetPath+" due to asset not found");
            Debug.LogError("Exception:" + e);
        }
    }
    PlayerSettings.SetIconsForTargetGroup(BuildTargetGroup.iOS,icons);
}

Can someone help me with that? What am I doing wrong?

Thank