```ruby
# encoding: utf-8

module GithubCLI

  # The API class is the main entry point for creating GithubCLI APIs.
  class API

    class << self

      # Access or initialize Github API client
      #
      # @api public
      def github_api(options)
        @github_api ||= begin
          @github_api = configure(options)
        end
      end

      # this could become a command such as configure that gets class options
      #
      # @api public
      def configure(options)
        api    = Github.new
        config = GithubCLI.config.data

        api.oauth_token = config['user.token'] if config['user.token']
        if config['user.login'] && config['user.password']
          api.basic_auth = "#{config['user.login']}:#{config['user.password']}"
        end
        api.endpoint = config['core.endpoint'] if config['core.endpoint']
        if ENV['TEST_HOST']
          api.endpoint = 'http://' + ENV['TEST_HOST']
        end
        api
      end

      # Procoess response and output to shell
      #
      # @api public
      def output(format=:table, &block)
        GithubCLI.on_error do
          response  = block.call
          if response.respond_to?(:body)
            formatter = Formatter.new response, :format => format
            formatter.render_output
          else
            response
          end
        end
      end

    end

  end # API
end # GithubCLI
```

Allow for basic auth setup.
user
```ruby
# encoding: utf-8

module GithubCLI

  # The API class is the main entry point for creating GithubCLI APIs.
  class API

    class << self

      # Access or initialize Github API client
      #
      # @api public
      def github_api(options)
        @github_api ||= begin
          @github_api = configure(options)
        end
      end

      # this could become a command such as configure that gets class options
      #
      # @api public
      def configure(options)
        api    = Github.new
        config = GithubCLI.config.data

        api.oauth_token = config['user.token'] if config['user.token']

        api.basic_auth  = set_basic_auth(config, options)

        api.endpoint    = config['core.endpoint'] if config['core.endpoint']

        if ENV['TEST_HOST']
          api.endpoint = 'http://' + ENV['TEST_HOST']
        end
        api
      end

      # Set user basic authentication
      #
      # @api public
      def set_basic_auth(config, options)
        if options['login'] && options['password']
           "#{options['login']}:#{options['password']}"
        elsif config['user.login'] && config['user.password']
          "#{config['user.login']}:#{config['user.password']}"
        else
          nil
        end
      end

      # Procoess response and output to shell
      #
      # @api public
      def output(format=:table, &block)
        GithubCLI.on_error do
          response  = block.call
          if response.respond_to?(:body)
            formatter = Formatter.new response, :format => format
            formatter.render_output
          else
            response
          end
        end
      end

    end

  end # API
end # GithubCLI
```
assistant