Stop crashes on verifyUser alertView handler

* Fixes crash when non initialized user ends up on the ToS Alert via
trying to view the wallet
Display error when VerifyUser is called w/o user

Since this is a case that shouldn’t occur in a production game, show
full native alert error to help devs get passed this edge case
Update Unity package / remove comments
Remove unused logs
Don't query wallet when no user is logged in

Log error for developer when this case happens
Merge pull request #28 from ArbiterGames/HandlNotInitializedError

Handle non initialized user error