set isAuthenticated flag for session

_docs/session/session.md

@@ -106,6 +106,18 @@ const AppViewModel = DefineMap.extend({
 
 That's it!  The `session` property in the above example will automatically populate when the user authenticates.
 
+### Detecting when the socket is authenticated
+
+You don't want to make requests that require auth before the Socket.io connection has been authenticated.  If you do, you'll see 
+`NotAuthenticated` errors in the console.  To prevent these errors you can watch for the `Session.current.isAuthenticated`
+attribute. If you have a component that immediately fetches data on render, you can conditionally render it:
+
+```hbs
+{{#if Session.current.isAuthenticated}}
+	<component-that-loads-data />
+{{/if}}
+```
+
 ### Handling OAuth Logins
 
-The `feathers-session` behavior is preconfigured to listen to `login` messages coming in over the [feathers-authentication-popups](https://github.com/feathersjs/feathers-authentication-popups) `authAgent`.  When any message is received through the `authAgent`, its validity is checked.  If it's a valid JWT token, a Session instance will be created automatically.  This will both populate `Session.current` and dispatch a `created` event on the connected Session Map.
+The `feathers-session` behavior is preconfigured to listen to `login` messages coming in over the [feathers-authentication-popups](https://github.com/feathersjs/feathers-authentication-popups) `authAgent`.  When any message is received through the `authAgent`, its validity is checked.  If it's a valid JWT token, a Session instance will be created automatically.  This will both populate `Session.current` and dispatch a `created` event on the connected Session Map.

session/session.js

@@ -75,6 +75,7 @@ module.exports = connect.behavior('data/feathers-session', function () {
 				feathersClient.authenticate({strategy: 'jwt', accessToken: token})
 					.then(function (data) {
 						var payload = decode(data.accessToken);
+						payload.isAuthenticated = true;
 						connection.createInstance(payload);
 					});
 			});
@@ -83,7 +84,9 @@ module.exports = connect.behavior('data/feathers-session', function () {
 			var requestData = convertLocalAuthData(data);
 			return feathersClient.authenticate(requestData)
 				.then(function (response) {
-					return decode(response.accessToken);
+					var payload = decode(response.accessToken)
+					payload.isAuthenticated = true;
+					return payload;
 				});
 		},
 		getData: function () {
@@ -92,6 +95,7 @@ module.exports = connect.behavior('data/feathers-session', function () {
 					feathersClient.authenticate()
 						.then(function (data) {
 							var payload = decode(data.accessToken);
+							payload.isAuthenticated = true;
 							return resolve(payload);
 						})
 						.catch(reject);