Replace other users affiliate link to own one.
pip install affilipy
from affilipy.amazon import amazon as amz
amz.replace('https://amzn.to/...', your_key)
#=> https://www.amazon.co.jp/gp/product/...?tag={your_key}
amz.get_asin_from_url('https://www.amazon.co.jp/gp/product/...')
#=> B123456789