Step #1 of tl;dr says: "Install git-review". This is *before* creating a new SSH key (step #2) and creating a developer account (step #3).
BUT, according to the instructions at the target "install git-review" link, BEFORE you are ready to install git-review, you should create a gerrit user account, set up an ssh key (3, 4), and clone a project repository.
Having already done steps 2 and 3 before doing step 1 makes tl;dr steps 2 and 3 redundant.