認証のベストプラクティス

def self.user_client(user_id)
    access_token=Rails.cache.fetch("box_tokens/user/#{user_id}", :expires_in => 50.minutes) do
        puts "getting new user token"
        response= Boxr::get_user_token(user_id, private_key: PRIVATE_KEY, private_key_password: ENV['JWT_PRIVATE_KEY_PASSWORD'])
        response.access_token
    end

    Boxr::Client.new(access_token)
end

//Define resource/scopes that downscoped token has access to
String resource = "https://api.box.com/2.0/files/RESOURCE_ID";
List<String> scopes = new ArrayList<String>();
scopes.add("base_preview");
scopes.add("item_download");

//Preform token exchange
ScopedToken downscopedToken =
    client.getLowerScopedToken(scopes,resource);

//Downscoped token available in downscopedToken.getAccessToken()