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https://gist.github.com/codezySG/9ce4ba1095bf3ff9d3fbd72d112562d0/raw/0be509e3af4ff7901f6892159f23d1490ae1257c/FirebaseService.js
https://gist.github.com/codezySG/9ce4ba1095bf3ff9d3fbd72d112562d0/raw/0be509e3af4ff7901f6892159f23d1490ae1257c/FirebaseService.js
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