May I ask is there a Gatling api for me to append new entry to a csv at a specified path?
Gatling scripts are written in Scala. Google for “scala append to file” and you should find the help you need.
One hint: You will want to embed the logic for appending to the file inside a session function, like so:
.exec( (session) => {
/* write your value to the file here */
session
})