This course is open to all. But, your script cannot download if I cannot provide proper username and password for lynda.
Nowadays, lynda is difficult to get username and password. Instead, linkedin is being redirected.
Kindly consider to make optional for username and password.
Some links in lynda is open to all without username and password. In such case, your script is waiting to verify username and password, which is not required for open access link. e.g https://www.lynda.com/Kotlin-tutorials/Anko-coroutines-Launch-basics/642478/710027-4.html
This course is open to all. But, your script cannot download if I cannot provide proper username and password for lynda. Nowadays, lynda is difficult to get username and password. Instead, linkedin is being redirected.
Kindly consider to make optional for username and password.