To connect Supermetrics to Verizon Media DSP, you will first need to obtain API access from Verizon. You will not be able to use the connector until this step is done.
You can do this by contacting your account manager at Verizon to whitelist the API access for your accounts. Note that API access must be granted for each ad account and for each "seat" you wish to access with Supermetrics.
Once your Verizon account manager has enabled your API access, you can then log into the Supermetrics connector with the approved username and password.
Please note that if you need to re-authenticate/remove user accounts/add user accounts, you will need to log out from Yahoo first.
If you have issues with the Supermetrics connection part of the process (after you have been approved for API access by Verizon), please create a new support request with the details of the issue and we will assist you.