```ruby
require "trello_newsletter/version"

module TrelloNewsletter
  # Your code goes here...
end
```

Add trello configuration to gem
user
```ruby
require "trello_newsletter/version"
require "trello"

Trello.configure do |config|
  config.developer_public_key = ENV['TRELLO_DEVELOPER_PUBLIC_KEY']
  config.member_token = ENV['TRELLO_MEMBER_TOKEN']
end

class TrelloNewsletter
  boards = Trello::Board.all
  puts boards
end
```
assistant