Create API to Store User Information

**Description:**
Develop an API endpoint to store user information, including:
- Avatar generation
- Username
- Address
- World ID badge information

**Requirements:**
- Implement a Next.js API route to handle user data submission.
- Use a database (e.g., PostgreSQL, MongoDB, or Prisma ORM) to persist user data.
- Ensure proper validation and error handling for input data.
- Implement avatar generation logic (e.g., using a library or placeholder service).
- Secure sensitive user data appropriately.

**Acceptance Criteria:**
- Users should be able to submit their information successfully.
- Data should be stored securely in the database.
- Proper API response codes should be returned.

#### ETA 48 hours