A plugin that has similar features register kick when people take too long,also one that people cant drop your items when loggin
You'll find SimpleAuth, HereAuth and about 20 others on Poggit if you search CI for 'Auth'. I'd recommend those two largely because you can be pretty sure they'll get updated for forthcoming MCPE versions, but the others might be worth trying too.
To be honest I've only ever used SimpleAuth just because once you've started it gets complicated to switch, and I use the same database for several servers. I'd be interested to hear what people have to say about PiggyAuth and the others though.