Update Cuepoints in IMA DAI SDK Roku

Hi All, I am using the IMA DAI SDK for Ads in video Player for that I am continuing with the IMA DAI SDK sample code basic example . Now there are 5 ads which are coming in 12 mins video. I just want to update the default ads position like the 1st ad starts at 0 sec and end at 10 sec . I want that ad to start at 10 sec and end at 20 sec. Does anyone had any idea how to achieve that. ?