ass="def">getSession</a> :: <a href="Network-MQTT-Authentication.html#t:Authenticator">Authenticator</a> auth =&gt; <a href="Network-MQTT-Authentication.html#t:Principal">Principal</a> auth -&gt; <a href="Network-MQTT-Message.html#t:ClientIdentifier">ClientIdentifier</a> -&gt; <a href="Network-MQTT-Broker.html#t:BrokerState">BrokerState</a> auth -&gt; <a href="../base-4.9.0.0/System-IO.html#t:IO">IO</a> (<a href="Network-MQTT-Broker.html#t:BrokerState">BrokerState</a> auth, (<a href="Network-MQTT-Message.ht