Error: listen EADDRINUSE: address already in use :::4040 code example

Example 1: EADDRINUSE: address already in use :::5000

sudo lsof -i :3000

Example 2: EADDRINUSE: address already in use

sudo lsof -i :<PORT>
kill -9 <PID>

Example 3: EADDRINUSE: address already in use :::5000

kill -9 {PID}