我希望FLARUM可以加入注册邀请码的功能，这样可以防止坏人的加入，同时我也希望可以隐藏每篇论坛内部分的文字，只有限定的用户组可以查看。
I hope that flarum can join in the function of registration invitation code, so as to prevent the bad guys from joining. At the same time, I also hope that I can hide the text in each forum, and only limited user groups can view it.
