The admin panel is a CRUD interface generated via the Administrate gem. In production, this is generally not used often and will be deprecated in favor of the internal panel (
http://localhost:3000/internal/*). For more details, see the internal guide.
There is an admin panel located at http://localhost:3000/admin.
To access the panel, you must be logged with a user with the
admin role activated.
To activate such a role, you can follow these instructions:
1 2 3 4
Loading development environment (Rails 5.2.3)  pry(main)> user = User.find_by(username: "bob")  pry(main)> user.add_role(:super_admin)  pry(main)> user.save!
Now you'll be able to access the administration panel.