As a user, I want to be able to purchase a subscription plan from the website.
Acceptance Criteria
Given that I am a customer who already has an account with ERA, I want to be able to purchase a subscription plan.
User should see a list of available subscription plans. User should be able to select a plan and proceed to the payment page. Payment should be processed through the Flutterwave. User should receive an email confirmation after successful subscription purchase. After successful confirmation of payment, the user should be given value for their subscription.