Thank you for your example about firebase login. ^_^ I have found a problem in your respository. You have unmerged code in repository in commit **0f3ada7**. <img width="1034" alt="屏幕快照 2019-09-10 01 37 09" src="https://user-images.githubusercontent.com/12483756/64553416-e5b02b00-d36b-11e9-8bfe-cf45364b0970.png">
Thank you for your example about firebase login. ^_^
I have found a problem in your respository.
You have unmerged code in repository in commit 0f3ada7.