In ClassWeb, usually, you cannot directly delete an account. The general procedure is to cancel the account instead. This will set the expiration date for the account to yesterday and terminate any active sessions. Two years after an account expires it will be deleted from the system.
Only by logging into ClassWeb using the supervisory account of minaret can you actually delete a user record. However, any active sessions that are running under that user name will not be terminated. To terminate any active sessions, you must first disable the account and then delete it.