Use DescribeRootFolders with an AWS SDK

  # Retrieves the root folder for a user by email
  # @param users [Array<Types::User>] A list of users selected from API response
  # @param user_email [String] The email of the user.
  def get_user_folder(users, user_email)
    user = users.find { |user| user.email_address == user_email }
    if user
      user.root_folder_id
    else
      @logger.error "Could not get root folder for user with email address #{user_email}"
      exit(1)
    end
  end

  # Describes the contents of a folder
  # @param [String] folder_id - The Id of the folder to describe.
  def describe_folder_contents(folder_id)
    resp = @client.describe_folder_contents({
                                              folder_id: folder_id, # required
                                              sort: 'NAME', # accepts DATE, NAME
                                              order: 'ASCENDING' # accepts ASCENDING, DESCENDING
                                            })
    resp.documents.each do |doc|
      md = doc.latest_version_metadata
      @logger.info "Name:          #{md.name}"
      @logger.info "Size (bytes):  #{md.size}"
      @logger.info "Last modified: #{doc.modified_timestamp}"
      @logger.info "Doc ID:        #{doc.id}"
      @logger.info "Version ID:    #{md.id}"
      @logger.info ''
    end
  rescue Aws::WorkDocs::Errors::ServiceError => e
    @logger.error "Error listing folder contents: #{e.message}"
    exit(1)
  end