Security is suppose to verify your entry to the resort - whether you’re a guest, are a DVC member, have a dining or activity reservation, signed up for a DVC tour, etc. - but it’s not uncommon that they accept your explanation without verifying it. You need to present ID to get into the hotels, hence what your driver likely provided.
Seems like Disney is primarily trying to block people from parking at the hotels and using their transportation to get to the theme parks. In the evening, they’re far more liberal in allowing you in without verifying. Obviously that won’t help the OP

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