how to fix Missing top-level class documentation comment code example

Example 1: how to fix Missing top-level class documentation comment

# app/models/user.rb

# rubocop:disable Style/Documentation
class User
end

Example 2: how to fix Missing top-level class documentation comment

# .rubocop.yml

Style/Documentation:
  Enabled: false

Example 3: how to fix Missing top-level class documentation comment

# app/models/user.rb

# Service to download ftp files from the server
class FtpService
end