Modify universal login url

Currently our organization has my-company.us.auth0.com/login as universal login url. How can I change it to my-company.us.auth0.com ?
Some history for this is:
In our tenant settings, I have set Tenant login URI
We have our Custom Domain as auth.mycompany.dev, if some one goes directly to auth.mycompany.dev, they get redirected to mycompany.dev which is an NXDOMAIN for us.
But if user enters auth.mycompany.dev/login, then user is redirected to appropriate login uri set in Tenant login URI