Yes, you can!
DESelect admins have the ability to unassign/assign licenses to other users.
All you have to do is navigate to the Admin Panel through the gear icon on the bottom right of your screen, as shown below:
On the overview screen, you can see all the available DESelect users. Select the user you want to activate/deactivate and click on the checkbox next to Active to change their status:
Click on Save to complete.