Implement user requests autorizations in the client side

client/angular/app/app.component.ts

client/angular/users/components/login/login.component.ts

client/angular/users/models/token.ts

client/angular/users/models/user.ts

client/angular/users/services/auth.service.ts

client/angular/videos/components/add/videos-add.component.ts

...angular/videos/components/list/videos-list.component.html

...t/angular/videos/components/list/videos-list.component.ts

...angular/videos/components/watch/videos-watch.component.ts

client/angular/videos/services/videos.service.ts