Fixed a typo and explained the API refresh issue (thanks Rahimateh)

templates/sso/serviceaccount/noneavailable.html

@@ -5,5 +5,9 @@
 {% block content %}
 <p>You have no services available to add to your account</p>
 
+<p>If this is unexpected, please check that your API key is correct. If 
+you have recently joined a corporation, then please use the "Refresh" 
+option on your API key</p>
+
 <p><a href="{% url sso.views.profile %}">Return to your Profile</a></p>
 {% endblock %}