structureController.sign access issues
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 Hi, There seems to be a bug with the new signing feature. Controllers signed by someone else cannot be accessed programmatically. Game.getObjectById('controllerId').sign--> It also affects JSON.stringify(controller)-->
 
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 _.omit(controller, 'sign'); 
 Has solved my problem, but it should still be resolved.
 
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 This broke my code as well. This is code breaking, most likely caused by a simple typo like "userane" (as the client shows the "username" field is stored in mongo) and still hasn't been fixed? 
 
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 I ran into this also. I had to unclaim, sign and claim again to not get the script execution. 
 
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 Fixed in this commit. 
 
