Login modal form in bootstrap - with Paypal API

1. User clicks "Log in". "Modal A" appears. Background becomes faded. Must look good! [Registration] 2. In "Modal A", user enters "Username", "Password", and "Email" - nothing else. 3. After registering, email sent to user with Personal Access Code (PAC). This is a random 6 digit code. 4. "Modal B" appears. A message states that PAC has been sent to user. [Login] 5. In "Modal A", user (also) logs in. 6. "Modal B" states that user has zero credits [Top up credits] 7. "Modal B" states "enter number of credits to buy". User enters number of credits on "Modal B" and clicks link to Paypal. 8. User makes Paypal purchase. ["Modal B" updated] 9. "Modal B" states updated number of credits - IF THIS IS DIFFICULT - 9. "Modal B" states please log out and log back in to see your updated number of credits. Then user logs out and logs back in, and Modal B states, user has [number] credit/s. [[login to view URL] - Personal Access Code. THIS PART IS EASY] 11. User telephones PBX. User enters PAC. 12. PBX calls database to check PAC. If PAC is in database, call continues. 13. 1 credit is used in database. 14. If no-one picks up phone, user can re-enter PAC to re-activate credit.