Update to use central lib for auth

From #344

Can we use our central lib for auth (instead of https://github.com/topcoder-platform/topcoder-x-ui/tree/develop/src/front/src/app/auth). Example- https://github.com/appirio-tech/connect-app/blob/test/auth0lib/package.json#L153 appirio-tech/connect-app#4082

Final Submission Guidelines

Git issue link: https://github.com/topcoder-platform/topcoder-x-ui/issues/347