I'm trying to add additional users to my pay pal account. We have a non-profit organization and several people need to get notified when a payment comes in. I am trying to add someone but PayPal keeps rejecting the use ID name. What does a User ID need to be? I tried the first and last name of the person, their email address but it keeps getting rejected, and, there's nothing there to tell me what it needs to be. I just get this error: Please enter a valid User ID.
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