Unable to add professor

[Derekljh]

Description of the Bug:
I believe the User Guide is not sufficiently clear that the contact has to exist before adding them as a professor.

Steps to recreate the bug:

1. Type prof -n aaron
2. Error message: No professors found! Please double check professors name.
3. Type add -n John Doe -p 98765432 -e [email protected] -a John street, block 123, #01-01
4. Type prof -n John
5. Error message is still the same.
6. Type prof -n John Doe
7. Error message is still the same.

Here are some screenshots:

I believe this might be just a case of an unclear User Guide description, but as a new user, I do not understand how to use this command properly.

This is the end of this bug report