Array of Invoice model instances
start date for the period this invoice is generated for
end date for the period this invoice is generated for
total amount for the invoice
currency for the invoice
option reference to the generated file of the invoice
due date for the invoice
status of the invoice - 0(PENDING), 1(PAID), 2(CANCELLED)
id of the tenant this invoice is generated for
main model of the service that represents a tenant in the system, either pooled or siloed