Store config at app.config (#312)

* Store config at `app.config`

* Use app.set to store config.

* Add test.

src/client/index.js

@@ -21,6 +21,7 @@ export default function(opts = {}) {
 
   return function() {
     const app = this;
+    app.set('authentication', config);
 
     if (!app.get('storage')) {
       const storage = getStorage(config.storage);

test/client/index.test.js

@@ -36,6 +36,15 @@ const setupTests = initApp => {
     app = initApp();
   });
 
+  it('config available at app.get("authentication")', () => {
+    expect(app.get('authentication')).to.deep.equal({
+      cookie: 'feathers-jwt',
+      tokenKey: 'feathers-jwt',
+      localEndpoint: '/auth/local',
+      tokenEndpoint: '/auth/token'
+    });
+  });
+
   it('local username password authentication', () => {
     return app.authenticate(options).then(response => {
       expect(response.token).to.not.equal(undefined);