-if (config && config.mongoConnectionString) {
- MongoClient.connect(config.mongoConnectionString, async function (err, client) {
- const db = client.db();
+if (config?.mongoConnectionString) {
+ // eslint-disable-next-line n/handle-callback-err
+ MongoClient.connect(config.mongoConnectionString, async (_err, client) => {
+ const db = client.db()