Flutter App with Auth & Subscription

I need a Flutter app that includes authentication and subscription functionalities.

Key Requirements:
- Login & Signup
- Subscription Page & Function
- Authentication Methods:
- Email and Password
- Phone Number
- Gmail Login
- User Account Verification: Email Verification
- Monthly & Annual Subscription Model

Ideal Skills:
- Experience with Flutter development
- Proficiency in implementing authentication methods
- Knowledge of subscription management in apps
- Familiarity with email verification processes

Looking for someone who can deliver a seamless and secure user experience.