post https://api.sandbox.primer.io/payment-instruments//vault
Save a SINGLE_USE payment method token so it can be used
again later. You can optionally choose to verify the payment method
before vaulting. If verification fails, no payment method data will
be vaulted. Verification can minimise fraud and boost subscription
rates for recurring payments.
If you try to vault an already vaulted token, you will get the existing vaulted token back.