Use the mounting feature in express instead http://expressjs.com/en/4x/api.html#app.onmount
api version ====
Wrapper for express routing methods to help with versioning apis
##Usage
>var apiv = require('api-version');
>var app = express();
>var api = apiv.version(app, '/api', 'v1');
>var api2 = apiv.version(app, '/api', 'v2');
>api.get('/user', function(){
>});
>api.post('/user', function(){
>});
>api2.get('/user', function(){
>});
>```
>Since the routes were added using api instead of app, the routes turn out to be
>```
/api/v1/user
and
/api/v2/user