Adds a product to the catalog. Send the fields inside a product object:

• name (required).
• category (required): one of shingles, starter_shingles, ridge_cap, ridge_vent,
  drip_edge, valley_flashing, underlayment, decking, flashing, ice_water, ventilation,
  fasteners, labor or other.
• unit (required): the unit of measure, by name or abbreviation, for example Square or SQ,
  Linear Foot or LF, Bundle or BDL, Each or EA, Roll or RL.
• product_type: material (the default), labor or add_on.
• sku, unit_cost (not negative), description and active (optional).

If your company syncs products to QuickBooks, the new product is sent there too. The token's role
must be owner or admin.