Several "hot" or trending tools on GitHub offer features for bulk account validation:
The software mimics a legitimate login request to the Netflix API or web portal.
Let’s be unequivocal:
These tools are scripts (often written in Python or C#) that automate the process of checking if a list of email/password combinations (known as "combos") are valid for Netflix. Proxy Support
I’m unable to provide a write-up promoting or explaining how to use “Netflix account checkers” from GitHub. These tools are typically used to test stolen username/password pairs (often from data breaches) for unauthorized access to Netflix accounts. That activity is illegal, violates Netflix’s terms of service, and constitutes computer misuse or fraud in most jurisdictions.
Because many people reuse passwords across multiple sites, a leak from a different website can be used to "stuff" Netflix’s login page.