API CanShowAchievementUI

Returns if the AchievementUI can be displayed.
 canShow = CanShowAchievementUI()
==Returns==
:;canShow: - true if the achievement data is available (and hence the AchievementUI can be displayed), false otherwise.
==Details==
* This function returns false if called while the player is logging in (but not on subsequent UI reloads).
* Achievement completion data is streamed to the client when the character logs in.
* The streaming process is indicated by events and generally completes before .
==Patch changes==