1. Get a ups.com account.
  2. If you have a login but no billing account yet with an Account Number then you need to sign up: https://www.ups.com/doapp/SignUpOpenAccount?loc=en_US
    1. If you have an account you can see your Account Number on your Invoice from UPS.
  3. Go to the UPS Developer Kit web page https://www.ups.com/upsdeveloperkit?loc=en_US
    1. Click request access key.
    2. Add account if needed.
  4. Enter the user login, account number, and account key in the A5 ship configuration page.

Other reference material: https://www.odoo.com/documentation/user/9.0/inventory/shipping/setup/ups_credentials.html