69             $association->handle);
101      * @param null $handle
104     function getAssociation($server_url, $handle = null)  argument
107         if ($handle !== null) {
110                 $this->associationKey($server_url, $handle));
139      * @param string $handle
142     function removeAssociation($server_url, $handle)  argument
148             $handle);
209      * @param null $handle
212     function associationKey($server_url, $handle = null)  argument
214         return 'openid_association_' . sha1($server_url) . '_' . sha1($handle);