javascript - Errors initiating Angular Authentication using JWTs and jwtInterceptor -

currently, running angular 1.6.6. , angular-jwt 0.1.9. following examples read.me file of angular-jwt auth0 site here "how can send jwt on every request server?". 2 examples vary slightly. angular-jwt docs uses jwtoptionsprovider , auth0 example uses jwtinterceptorprovider in .config section angular controller.

when run code browser console states:

"failed instantiate module controllername due to: error: [$injector:unpr]  unknown provider: jwtinterceptorprovider" 

the error same jwtinterceptorprovider , jwtoptionsprovider. here code in angular controller, same docs. wanting make code run can understand how use it:

angular   .module('app', ['angular-jwt'])   .config(function config($httpprovider, jwtoptionsprovider) {       jwtoptionsprovider.config({       tokengetter: ['myservice', function(myservice) {       myservice.dosomething();       return localstorage.getitem('id_token');       }]  });     $httpprovider.interceptors.push('jwtinterceptor');  }) 

can explain why error occurring , how correct it?