Step 1  Press the "Option+Command+U" keys to activate the "User Registration" dialog.

Step 2 Press the "Ctrl+Option+Left/Right" keys to traverse through the content of the "User registration" dialog. 

Step 3  Press the "Ctrl+Option+U" to open the "Rotor" dialog and switch to the "Form Fields" list using the "Left/Right" keys, then press the "Return" key or press Ctrl+Option+Left/Right" keys to navigate to the "Yes" button of the "User Registration" dialog. 

Step 4  Press the "Ctrl+Option+Space" keys add the user to the "Unstoppable User" group.