Create a Sample Chrome Extension with User Authentication, Payment Integration, and Credit System

Title: Create a Sample Chrome Extension with User Authentication, Payment Integration, and Credit System

Description:

We are looking for an experienced Chrome Extension developer to create a sample Chrome extension with user authentication, payment integration, and a credit system. The purpose of this project is to allow us to integrate this functionality into our existing Chrome extensions without revealing our original code.

Requirements:

1. User authentication with a reliable 3rd party service (e.g., Google Sign-In or another recommended service)
2. Payment integration for purchasing access to the extension and credit packages
3. A credit system that deducts credits based on specific user actions within the extension
4. Ensure that only one person can use an access key at a time
5. Provide clear and detailed documentation (Google Doc) on how to implement the provided code into our existing extensions

Deliverables:

- A fully functional sample Chrome extension that demonstrates the required features
- Well-structured, reusable, and easily understandable code
- Detailed documentation on how to use the code and integrate it into our existing Chrome extensions
- Recommendations for the best 3rd party services to use for user authentication and payment processing

Please include examples of your previous Chrome extension projects in your proposal, as well as any relevant experience with user authentication and payment integration. We are looking for someone who can provide a high-quality solution and clear instructions to ensure the successful integration of these features into our extensions.

Thank you for your interest in this project, and we look forward to working with you!