post https://www.ruddr.io/api/workspace/project-invoice-milestones
Project invoice milestones can only be created on projects with a
billingTypeId
of"fixed"
or"fixed_recurring"
.
If either
quantity
orrate
are set to a value, then both are required andfee
will be calculated. Otherwise, those fields can be set tonull
(the default) andfee
can be set directly.