How to get the download link?

Thank you for this awesome tool, I am trying to get the download URL rather than saving the pdf to a folder.

```
from scidownl import scihub_download
paper = '32467232'
paper_type = "pmid"
out = "./paper/one_paper.pdf"
scihub_download(paper, paper_type=paper_type, out=out)
```

How to get the download link here?