A bank account at another financial institution that is owned by your program. Typically used for pushing/pulling money to/from a programAccount

programExternalAccount Object

Property	Data Type (length)	Description
`accountNumber`	string	Bank account number.
`accountNumberMasked`	string	Masked version of `accountNumber`
`description`	string
`externalAccountId`	integer	Same as `programExternalAccountId`
`isActive`	boolean
`nachaName`	string	If your program has ACH via NACHA enabled, the `routingNumber` will be used to retrieve the actual NACHA bank name (via the Federal Reserve data file). If your program does not have ACH via NACHA enabled, whatever value you provide here will be stored verbatim.
`programExternalAccountId`	integer	Helix-assigned unique ID
`routingNumber`	string	Routing number for the financial institution where this account is held
`type`	string