If you have a coworker who you want to be able to access the Console on your behalf, you should create a new user for them (don't share your own account/password). You can add new users yourself...
Click your member name in the top right corner of the window
Click the Users tab in the menu ribbon and then click the green Add User button on the right
Fill in the details and click the blue Add User button. You can also delete users from this page, simply click the red Delete button on the same line as the user you wish to remove.