def save_netrc_entry(email_address, api_key)
      netrc = open_netrc
      netrc["api.#{host}"] = [email_address, api_key]
      netrc.save
    end
def save_netrc_entry(email_address, api_key)
      netrc = open_netrc
      netrc["api.#{host}"] = [email_address, api_key]
      netrc.save
    end
Saves the user's email address and AP key to the Turbot host's entry in the
 `.netrc` file.