It’s a beautiful day! 
The much requested and long-desired form-submit (aka prelogin) functionality is now available for testing!
This functionality was inspired by @drogfild (thank you for your work!) but fully redesigned. It can be used for any form, not just for login and works with sessions so in many cases you only need to submit the form (login) once after a restart of home assistant.
An explanation of the form-submit functionality can be found on the wiki.
If you want to test this (and I hope many do), please download the files from the form-submit branch, and copy them manually in your custom_components/multiscrape folder.
Please post general questions and comments in this forum thread and issues on github.