How to use cocoon ad plugin with my phaser 3 game

My Phaser 3 game is done. It builds successfully at cocoon.io and runs great on my test devices. All I need to do is incorporate cocoon-plugin-ads-android-admob for interstitial ads to monetize the app. I unsuccessfully tried to follow the instructions for cocoon-ads.js by Atomic Plugins. Has anyone used this plugin with Phaser 3?