So I'm making a plugin that utilizes vanish as a means to turn players invisible in an area (i already have the area thing sorted out im using Zone Manager  but how would I go about encorporating this plugin? obviously using the avaliable API, is there even a way? 

The initial thing i did try was to use the vansish.permanent permission to put people into vanish instantly but that didnt seem to work as they were still visible.

Above anything a code exaple would be most helpful (I am new to this whole plugin making thing so if this is a very dumb question please dont be affraid to set me straight).