Retrieve the required parameters for a specific Payin-Method.

The parameters are returned as a list of objects. The name of each field appears in the name variable of the payin_method_param array.

The parameters returned could be optional or mandatory, for example, if you pass the Payin-Method for accepting payments via NPP in Australia (Payin-Method name: au_bank_npp), the parameter returned is a payid_reference. This is an optional field so in case this field is not provided, Finmo may generate a random value.