Evaboot uses your Linkedin cookies to connect to your Linkedin account and export the data you need.
The Evaboot Chrome Extension is here to facilitate that process.
To be able to scrape Sales Navigator you need to:
have the Evaboot Chrome extension installed
be logged in on Linkedin
You must stay logged in on Linkedin while Evaboot is exporting data. If you log out while Evaboot is working your export will fail.
What if I need to export from several Sales Navigator accounts at the same time?
If you need to use various Sales Navigator account at the same time you can use different Chrome sessions to connect to different Linkedin profiles at the same time.
Here is a tutorial: