Add validation checks when questions are being added (ensure all fields like question text, options, and answer are present and correctly formatted).
Update the quizQuestions function to incorporate these checks.
Test to ensure that invalid questions cannot be added and that the validation works as expected.

Formatting issues (e.g., headings not displaying correctly, broken links, improper list formatting)
Inaccurate or unclear content (e.g., installation instructions are incorrect, usage examples are not clear)

Diagnose the issue in the login system (perhaps it's a problem with how the user credentials are checked or how the data is retrieved from user_accounts.json).
Make the necessary changes in your code.
Test thoroughly to ensure the issue is resolved.