User Registration endpoint inconsistent in docs / swagger / Postman collection

In realworld/api/README.md, Registration is "POST /api/users."

In realworld/api/Conduit.postman_collection.json, the test is "raw": "{{APIURL}}/users" and path is ["users"].

In realworld/api/swagger.json, the operation to "Register a new user" is in the entry for "user": "post."

It looks like #612 changed the Swagger from "users" to "user."