Create user module, add posibility to request access to a service

src/app/app.module.ts

src/app/core/components/index.ts

...ore/components/user-services/user-services.component.html

...ore/components/user-services/user-services.component.scss

src/app/core/core-routing.module.ts

src/app/core/core.module.ts

src/app/core/models/auth.model.ts

src/app/core/services/auth.service.ts

...nts/dataset-detail/dataset-data/dataset-data.component.ts

src/app/user/components/index.ts

...ser/components/user-services/user-services.component.html

...ser/components/user-services/user-services.component.scss

.../components/user-services/user-services.component.spec.ts

.../user/components/user-services/user-services.component.ts

src/app/user/models/index.ts

src/app/user/models/user-services.model.ts

src/app/user/services/index.ts

src/app/user/services/user-services.service.ts

src/app/user/user-routing.module.ts

src/app/user/user.module.ts