Login: add link to SAML login (#11541)

* Login: add link to SAML login

* Typos

Author: stsewd

readthedocs/templates/account/login.html

@@ -71,6 +71,15 @@ <h3>{% trans 'Or' %}</h3>
   <div class="clearfix">
     <ul class="socialaccount_providers">
       {% include "socialaccount/snippets/provider_list.html" with process="login" next=request.GET.next verbiage="Log in using" %}
+      {% if USE_ORGANIZATIONS %}
+      <li>
+        <form action="{% url "saml_resolve_login" %}{% if redirect_field_value %}?{{ redirect_field_name }}={{ redirect_field_value }}{% endif %}" method="get">
+          <button class="socialaccount-provider button" type="submit">
+              {% trans "Log in using single sign-on" %}
+          </button>
+        </form>
+      </li>
+      {% endif %}
     </ul>
   </div>
 {% endif %}