Bom dia, ao finalizar o módulo 2, estou com erro ao se autenticar no login, da erro de usuário e senha, e aparece esse erro no console: TypeError: Cannot read property 'length' of null at HttpHeaders.push../nodemodules/@angular/common/fesm5/http.js.HttpHeaders.applyUpdate (http.js:200) at http.js:171 at Array.forEach () at HttpHeaders.push../nodemodules/@angular/common/fesm5/http.js.HttpHeaders.init (http.js:171) at HttpHeaders.push../nodemodules/@angular/common/fesm5/http.js.HttpHeaders.forEach (http.js:236) at Observable.subscribe (http.js:1436) at Observable.push../node_modules/rxjs/esm5/internal/Observable.js.Observable.trySubscribe (Observable.js:43) at Observable.push../node_modules/rxjs/_esm5/internal/Observable.js.Observable.subscribe (Observable.js:29) at subscribeTo.js:21 at subscribeToResult (subscribeToResult.js:11)
https://github.com/Lucasmaciiel/projeto-photos/tree/master/alurapic