this.cr

class Tmdb::Requester

  def self.get(url, params = {} of Char => Char)
    url = api.url_for(action, params)
    HTTP::Client.get(url, headers: headers)
  end

  private def api
    Igdb::Api.instance
  end

  private def headers
    Hash.new.tap do |headers|
      headers["Accept"] = "application/json"
      headers["Content-Type"] = "application/json"
    end
  end

end

Returns:

in ./src/tmdb/requester.cr:4: undefined local variable or method 'api'

    url = api.url_for(action, params)
          ^~~