Ghost/ghost/admin/app/routes/members.js

import AuthenticatedRoute from 'ghost-admin/routes/authenticated';
import {inject as service} from '@ember/service';

export default AuthenticatedRoute.extend({
    config: service(),

    titleToken: 'Members',

    // redirect to posts screen if:
    // - developer experiments aren't enabled
    // - TODO: members is disabled?
    // - logged in user isn't owner/admin
    beforeModel() {
        this._super(...arguments);

        if (!this.config.get('enableDeveloperExperiments')) {
            return this.transitionTo('posts');
        }

        return this.session.user.then((user) => {
            if (!user.isOwnerOrAdmin) {
                return this.transitionTo('posts');
            }
        });
    }
});