An ID card in a dream represents your identity. You note that both values (money) and identity (ID card) are different in nonphysical reality than you experience them in physical reality. In this case the ID card might indeed be about getting access - what you can access in nonphysical reality is encoded in your energy field. You're in a sense getting a read-out of that. This is different from a Gatekeeper, which would normally check your ID instead. An avatar means embodiment, so maybe this refers to you as the incarnate, giving energy (current-cy ) / attention to gaining access to information (as laid out in the catalogue).