Login to website, upload spreadsheet and submit form, then download response spreadsheet.

I need to use a service that doesn't have an API, what's the recommended way to achieve the above. I tried Googling for a solution, but I don't know exactly what to look for, I've never done this before.​Can somebody point me in the right direct, i.e. Package or term to Google for

Submitted July 24, 2019 at 05:12AM by IHaveNeverEatenACat