Using a third party class in CI4

I want to use the influxdb-php class in CI4:
https://github.com/influxdata/influxdb-php
I tried calling the class from the controller using:

PHP Code:

use InfluxDB;
use InfluxDB\Client;
use \InfluxDB;
use \InfluxDB\Client; 


But no success. I installed it using composer:

Code:

composer require influxdb/influxdb-php