strapi/packages/core/admin/doc/customize-menu.md

Customizing the Admin leftMenu

You can choose which Content Types you want to display in the admin.

For example if you want to display only the user content type you have to edit the layout.js file located in my-project/admin/config/layout.js as follows:

module.exports = {
  contentTypesToShow: [
    {
      label: '',
      destination: 'user',
    },
  ],
};