Update note about authentication on frontends

README.org

@@ -83,9 +83,10 @@ password: MYPASSWORD
 ' > ~/.python-grid5000.yaml
 #+END_EXAMPLE
 
-- When accessing the API from a Grid'5000 frontend, providing the username and
-  password is optionnal. Nevertheless you'll need to deal with SSL verification
-  by specifying the path to the certificate to use:
+- When accessing the API from a Grid'5000 frontend, providing the username
+  and password is optionnal. Authentication should work out-of-the-box; if
+  it fails, try updating python-grid5000, or specify the path to the
+  certificate to use:
 
 #+BEGIN_EXAMPLE
 echo '