Am not an expert on web stuff but how about logins? Online system sounds like one that would require users to log in. Their username/emails have to be unique

On Tue, Apr 29, 2014 at 4:10 PM, Yvonne Murenga <yvymurenga@gmail.com> wrote:

Hey guys how can I come up with a way of generating unique codes for identifying users in an online system? One that is not predictable?

Thanks

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