Enabling Stored Cards (aka Customer Vault)

Franchisees can choose to enable Stored Cards (aka Customer Vault)

this makes it easy for the zees to reuse cards.. so that they can avoid asking the customer for the card again

Possible ways they'll use it:

1) Having the FO charge the remaining balance when the job is done without having to ask the customer again for the CC#

2) Making it easier to just say "can we reuse your old card ending in 0552?"

First time they enter a card, nothing looks different.

When they go back to take a second payment, it shows any saved card(s) used. Looks like this:

They can click the radio button, it lets them enter the amount and charge it to the specified card. 

Prerequisites:

1) They have to enable Customer Vault in NMI (aka 'retriever website'). It costs $0/mo but adds a few cents to each transaction.

2) Once they've done that, we can turn on the feature on our side ("MiraPayCustomerVault")

3) If you turn on the new feature without them having vault enabled, it'll probably stop every payment from working because of errors from the vendor for using an unapproved feature. 

Break glass: Turn off the feature in the admin.