If you have restricted the number of device login limits per user, the users won't be able to login up with any new device once that limit is reached.
However, if the user wants to remove the login from any existing device and replace it with a new device login, the admin has the right to make those changes through the course platform.
Steps to reset Users Login Device:
Go to the left nav > select USERS > Learners.
On the landing page, you will have the cumulative list of all the learners who have signed up for any of your courses.
Search the learner by name, email id, or any other filter whose device you want to reset. To sort tap on "Apply filters".
Now choose the learner whose device you want to reset. Under Actions, select the "User Details" icon.
On the "User Details" landing page, scroll down to "Login Details". You will find Login details, Change password or Delete the user that no longer wants to be connected to the course platform. Then "Save" to keep changes.