Validator module version is set to its latest in dependencies

[imesh]

As it seems like 'validator' module version has been set to its latest in dependencies and as a result validation logic written in login.js and registration.js` files are not functioning now:

api-proxy: login-app
package.json

  "name": "oauth-login-consent",
  "version": "1.0.1",
  "description": "Lightweight web app to support OAuth2 authorization_code grant login/consent flow.",
  "main": "app.js",
  "repository": "https://github.com/apigee/api-platform-samples.git",
  "dependencies": {
    "apigee-access": "^1.3.0",
    "body-parser": "^1.9.2",
    "cookie-parser": "^1.3.3",
    "ejs-locals": "^1.0.2",
    "express": "^4.10.2",
    "express-session": "^1.9.1",
    "less-middleware": "^0.1.12",
    "serve-favicon": "^2.1.6",
    "validator": ">2.0.0"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Apigee Corporation",
  "license": "MIT"
}

Error:

TypeError: org.mozilla.javascript.Undefined@0 is not a function, it is undefined.
    at /organization/environment/api/routes/registration.js:117:0
    at /organization/environment/api/routes/registration.js:24:0
    at handle (/organization/environment/api/node_modules/express/lib/router/layer.js:95:0)
    at next (/organization/environment/api/node_modules/express/lib/router/route.js:137:0)
    at dispatch (/organization/environment/api/node_modules/express/lib/router/route.js:112:0)
    at handle (/organization/environment/api/node_modules/express/lib/router/layer.js:95:0)
    at /organization/environment/api/node_modules/express/lib/router/index.js:281:0
    at process_params (/organization/environment/api/node_modules/express/lib/router/index.js:335:0)
    at next (/organization/environment/api/node_modules/express/lib/router/index.js:275:0)
    at /organization/environment/api/node_modules/body-parser/lib/read.js:130:0
    at invokeCallback (/organization/environment/api/node_modules/raw-body/index.js:224:0)
    at done (/organization/environment/api/node_modules/raw-body/index.js:213:0)
    at onEnd (/organization/environment/api/node_modules/raw-body/index.js:273:0)
    at emit (events.js:92:0)
    at _stream_readable.js:943:0
    at _tickDomainCallback (trireme.js:491:0)
    at _tickFromSpinner (trireme.js:422:0)