_toc> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class=md-nav__list data-md-component=toc data-md-scrollfix> <li class=md-nav__item> <a href=#1-security-overview class=md-nav__link> <span class=md-ellipsis> 1. Security Overview </span> </a> </li> <li class=md-nav__item> <a href=#2-authentication class=md-nav__link> <span class=md-ellipsis> 2. Authentication </span> </a> <nav class=md-nav aria-label="2. Authentication"> <ul class=md-nav__list> <li class=md-nav__item> <a href=#2