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import httpx
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async def is_email_registered(as_client: httpx.AsyncClient, email: str) -> bool:
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    """
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        Abuse the gxlu endpoint to check if any email address
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        is registered on Google. (not only gmail accounts)
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    """
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    req = await as_client.get(f"https://mail.google.com/mail/gxlu", params={"email": email})
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    return "Set-Cookie" in req.headers
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