Added period field to Item

Author: JaviCerveraIngram

connect/models/product.py

@@ -140,3 +140,8 @@ class Item(BaseModel):
 
     global_id = None  # type: str
     """ (str) Global id. """
+
+    # Undocumented fields (they appear in PHP SDK)
+
+    period = None  # type: str
+    """ (str) Period. """

connect/models/schemas.py

@@ -240,6 +240,7 @@ class ItemSchema(BaseSchema):
     old_quantity = QuantityField(allow_none=True)
     renewal = fields.Nested(RenewalSchema, allow_none=True)
     global_id = fields.Str()
+    period = fields.Str()
 
     @post_load
     def make_object(self, data):