Generate UUID values for identifiers and fixtures.
6c140846-98aa-411a-ae04-4e75f64a40c9
4a1481ec-129a-4748-a2bc-94e5f3099462
7328d2a2-fd23-412d-9f07-7ed823fead86
6d986de8-e9ea-47f5-b2a0-d891869cd0a3
0e72686b-df56-4786-a3de-2a277f953b29