Prosody auth, first working code:

* generated password on an api call
* use this password to authenticate on prosody
* using helper getAuthUser when available, else fallback to custom code

conversejs/index.html

@@ -24,7 +24,7 @@
     room: '{{ROOM}}',
     boshServiceUrl: '{{BOSH_SERVICE_URL}}',
     websocketServiceUrl: '{{WS_SERVICE_URL}}',
-    tryAuthenticatedMode: '{{TRY_AUTHENTICATED_MODE}}'
+    authenticationUrl: '{{AUTHENTICATION_URL}}'
   })
 </script>
 </body>