[bloggerDev] Get profile information

1. Using javascript, is it possible to get a reader's profile such as
birthdate, sex or location as I intended to make a suggestions based
on their profile.

2. Using AJAX or Javascript, is it possible to get the reader username
as I would like to log their username and which post did they read to
understand more about my readers?

If so, can you give me a basic example on how to achieve this.

Thanks

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