You will have to log in and or setup your password to complete the log in process
You should of gotten an email asking you to log on and create a password. If you didn't get a email check with the lab manager and scheduler.
To trade a shift you cannot work, go to the list in the top right of the dashboard. Next to each of your listed shifts, there is a little page icon. If you click it, it will bring up a new menu.
From here, you can choose to trade your shift for someone else's.
You can then select a shift you'd like to work, and request a trade.
In order to make this process easier, you can go to the availability tab on the left before you begin.
This screen will let you select times that you cannot fill in for someone else during.
If you've filled out your availability, the list you're given to select a shift to trade is narrowed to match what you are able to swap.