Allow usersettings to be saved for rest provider

`map-create-to-upsert` maps create to an upsert. Since we restrict
patches and creates to the owner we have to provide the `user` object in
the `hook.params`. This is done automatically when we add the
authenticate hook with strategies `local` and `jwt`. Otherwise a http
request will be rejected.

Author: roschaefer

server/services/usersettings/usersettings.hooks.js

@@ -1,9 +1,13 @@
+const { iff, isProvider } = require('feathers-hooks-common');
 const { restrictToOwner } = require('feathers-authentication-hooks');
 const mapCreateToUpsert = require('../../hooks/map-create-to-upsert');
+const auth = require('@feathersjs/authentication');
 
 module.exports = {
   before: {
-    all: [],
+    all: [
+      iff(isProvider('rest'), auth.hooks.authenticate('jwt'))
+    ],
     find: [],
     get: [],
     create: [