expose the user rendering activity

HISTORY.rst

models/activity.go

models/render_stats.go

models/userinfo.go

restapi/embedded_spec.go

restapi/handlers/auth-userinfo.go

restapi/handlers/user-get.go

restapi/handlers/user-get_test.go

restapi/handlers/user-list.go

restapi/handlers/user-list_test.go

restapi/handlers/user-update.go

restapi/handlers/user-update_test.go

swagger.yaml

tests/user_management_test.go