a. if fails, display incorrect pin and number of attempts left(max 3)
    - if continues to fail, log them out
b. if passes, continue down

- ask user to select the currency to withdraw
- ask user to enter amount to withdraw (do not allow above max balance)
- withdraw and update the account accordingly
- ask whether receipt must be printed
    * if yes then print receipt, if not print nothing
- generate transaction ID and log transaction
- ask to perform another transaction
    * if yes, go back to 3, if not then log out

- display balance for all currencies available
- ask whether receipt must be printed
    * if yes then print receipt, if not print nothing
- generate transaction ID and log transaction
- ask to perform another transaction
    * if yes, go back to 3, if not then log out

- tell user to enter old pin
- tell user to enter new pin
- tell user to confirm new pin
- update the new pin on the user
- generate transaction ID and log transaction
- ask to perform another transaction
    * if yes, go back to 3, if not then log out

- display list of past transactions for logged in user