feat: Add WHITELIST feature to vercel branch

[ACHMEDIUS]

Description

Added WHITELIST feature from main to vercel branch and updated tests to point to vercel's api folder

Fixes #857

Type of change

• New feature (added a non-breaking change which adds functionality)

How Has This Been Tested?

• Ran tests with composer test
• Added or updated test cases to test new features

Checklist:

• I have checked to make sure no other pull requests are open for this issue
• The code is properly formatted and is consistent with the existing code style
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

Screenshots