ok - I think I see the difference -
member id - system record number - auto generated
. . . so is there any reason for the user to ever see this or know about this?
user id - selected by user, as long as it is unique
. . . can be used in place of email for signing in, so that more than one person can sign in with the same email address
QUESTION, as I will be loading a new database in as soon as friendly url's are available -
when I set up the database fields for upload, do I ignire the member id? does it just generate itself as it creates each record? (And go ahead and load the user ids as a custom field for future use?)