polymer - Detect Firebase Authorization Failure With Polymerfire -

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what best practice detect when authorization fails due firebase security rules. example if security rules in firebase database not allow current logged in user below access "/path/to/data" how can detected?

<firebase-document     id="document"     app-name="notes"     path="/path/to/data"     data="{{data}}"> </firebase-document>

as of polymerfire 0.9.5 document , query elements emit "error" event when read access denied:

<template>   <firebase-document       id="document"       app-name="notes"       path="/path/to/data"       data="{{data}}"       on-error="handleerror">   </firebase-document> </template> <script>   polymer({     handleerror: function(e, err) {       // handle error     }   }); </script>

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