這個帖子會記錄一些集成聯調Firebase Analytics中遇到的一些問題，以備查閱。
1、在控制檯調試Audiences，看不到數據，即使選擇All users都是顯示爲0
老外的回覆：Audience reporting is thresholded, meaning that until the number of users is >= 10, it will obscure the reporting for privacy reasons. So, once 10 devices have installed your app and logged events, your All Users audience will show 10 users.
https://stackoverflow.com/questions/37561584/firebase-analytics-no-data-reflection-on-audiences-tab