Using Payflow credentials
Login with your Payflow credentials, leaving the Users field blank if
you are logging in for the first time, or have not setup additional users.
Use PayPal credentials
Use your PayPal username (email address) and
password to login.
If this is the first time you are logging in with your PayPal credentials,
you will be asked to Link your PayPal Account to your Payflow Account.
Once linked, you'll be able to log into PayPal Manager using
either Payflow or PayPal credentials.