Procedure summary

1. Add API identities for the buyer and the procurement employee.
2. Add API roles for the buyer and for the procurement employee.
3. Define route authorizations for the buyer role.
4. Assign the buyer role to the API identity of the buyer.
5. Define route authorizations for the procurement employee role.
6. Assign the procurement employee role to the API identity of the procurement employee.
7. Enable the API authorizations.