app\static\js\AppRouter(8).jsx

#...
import AuthedRoute from './AuthedRoute';
import UnauthedRoute from './UnauthedRoute';
#...

class AppRouter extends Component {
  #...
  
  render() {
    return (
      #...
          <Switch>
              <Route exact path="/" component={() => <Home currentUser={this.props.currentUser} />} />
              <UnauthedRoute path="/register" component={Register} />
              <UnauthedRoute path="/login" component={Login} />
              <AuthedRoute path="/settings"  component={Settings} />
              <AuthedRoute path="/@:username" component={Profile} />
          </Switch>
      #...