[Bug]: What is anonymousId?

[victorkennedys]

Is there an existing issue for this?

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Current Behavior

Hi! I am wondering what anonymousId is, i.e. what is returned in : await facebookAppEvents.getAnonymousId();

Is it the same as attribution id? More info here: https://developers.facebook.com/docs/marketing-api/app-event-api/#testing

Thank you for a great plugin!

Expected Behavior

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Steps To Reproduce

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Platform

iOS

Flutter Doctor

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