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# IP Address the current User had during registration.
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# A WordPress® Role ID (i.e. s2member_level[0-9]+, administrator, editor, author, contributor, subscriber).
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# An s2Member Membership Access Level number.
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# An s2Member Membership Access Label (i.e. Bronze, Gold, Silver, Platinum, or whatever is configured).
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# Number of times the User has logged into your site.