Need a help in extension

Hi guys, I am soon launching facebook ads extension but, I face a problem, The problem is that some people resell extension, I want to make a system in which,

If app package name doesn't contain the the user email, app will close, kindly help me implement this


Yes i also want the answer on this topic as it is a big problem of reselling extension

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Manifest contains email. So you can parse the manifest using xml parsers.
But there is a big disadvantage in this method which is...

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