fix(users): prevent crash on non-existent users for the auth middleware

Prevent crashing when checking the property lastPasswordChangedAt for null users

src/config/initializers/middleware.js

@@ -166,6 +166,10 @@ module.exports = (App, Config) => {
 
       App.services.User.FindUserObjByEmail(email)
         .then((user) => {
+          if (!user) {
+            return done(new Error("User not found"));
+          }
+
           const userWithoutLastPasswordChangedAt = user.lastPasswordChangedAt === null;
           const userWithLastPasswordChangedAtLowerThanToken =
             user.lastPasswordChangedAt &&