How to save multi-row query in mysql via node.js?

Question

MySQL

My question is how to save multi row query in mysql via node.js?

for (let key in results) {
        pool.query(
          `INSERT INTO users (username, firstname, lastname, age) VALUES ("${results[key].username}","${results[key].firstname}","${results[key].lastname}","${results[key].age}" )`,
          function(err, rows, fields) {}
        );
      }

how will the query be executed correctly?