I learned from this document:
but I did not see the [Gererate a new Application ID ] bottom,why?
The pic your can see on :
https://i.loli.net/2018/06/07/5b1889772eafe.png
<img src="https://i.loli.net/2018/06/07/5b1889772eafe.png" alt="trquestion.png" title="trquestion.png" />