Developer to Add login to existing chrome extension + Restructure Code (Code refactoring)

This extension books trips offered on a particular website. What I need done: 1. We need developer to add a login function to the extension which will direct users to our website where user can login. User should ONLY be allowed to use extension after logging in through our website. Login should be required every 24 hours. 2. Previous developer was trying to add functions that ended up not working out. We will need all these extra code to be removed from the backend and only code needed for auto booking trips left on backend. We will explain more of this before awarding job. We want this work done in 5 to 7 days maximum. Kindly we need ONLY experienced developers. You need to show a high level of understanding in code refactoring. **EXTRA MILESTONE** If the above work goes well and we are comfortable with your work, we will need to add extra filters to this extension. Previous developer tried to add the extra filters but this interferes with the trip auto booking speed. You will need to make sure the extra filters don't interfere with the auto booking speed. We can discuss the details later for a new milestone. **CONTINUOUS WORK** The website we are using for booking trips is always upgraded with new elements. Because of this we also have to keep updating our extension so as to keep up with the changes. For this we need a developer to be able to work with us continuously.