Renamed authentication middleware to createSessionFromToken

no issue

- This rename comes in to describe better what actually happens behind the middleware instead of catch-all "authentication"

core/server/services/members/middleware.js

@@ -77,7 +77,7 @@ module.exports = {
             constants.ONE_HOUR_S
         )
     ],
-    authentication: [
+    createSessionFromToken: [
         getMemberDataFromSession,
         exchangeTokenForSession,
         decorateResponse

core/server/web/site/app.js

@@ -123,7 +123,7 @@ module.exports = function setupSiteApp(options = {}) {
     siteApp.delete('/members/ssr', membersMiddleware.deleteSession);
     siteApp.post('/members/webhooks/stripe', membersMiddleware.stripeWebhooks);
 
-    siteApp.use(membersMiddleware.authentication);
+    siteApp.use(membersMiddleware.createSessionFromToken);
 
     // Theme middleware
     // This should happen AFTER any shared assets are served, as it only changes things to do with templates