This is not reccomended but you can explicilty set the API key in your code. In Javascript: 
import { LytixCreds, MetricCollector } from "@lytix/client";

/**
 * First set the API key
 */
LytixCreds.setAPIKey("sk-1234");

/**
 * Then you can use Lytix normally
 */
await MetricCollector.increment("testMetric");
In Python: 
from lytix_py import MetricCollector, LytixCreds

"""
First set the API key
"""
LytixCreds.setAPIKey("sk-1234")

"""
Then you can use Lytix normally
"""
MetricCollector.increment("testMetric");