Step 1 - Go to the switch user page

From the main screen, press on the user icon in the top left.


Step 2 - Press on the user name

Now press on the username (not the image... just the name) of the user that you want to delete.  You will now see a menu pop up with multiple options. Press on "Edit user"


Step 3 - Change the name

Just press on the username to enter a new name.


Step 4 - Press Save

Press on the save button to save your changes.