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If "SHUFFLE" can share data login section for the @OP account + all of their alternated account. Then, should be can address the issue to be solved and the rest just waiting the flow case based how the @OP gonna to responds into those response. But, I must agree rather than "SHUFFLE" mentioned only Multi Account and user will response "I'm not doing any multi account". It's better just dump the list account with section login, should be not hard at all.
There was a past case where a casino is willing to take this approach, prove the multi-acc by showing login credentials [partially, of course, as they still value privacy] to show the forum that they didn't wrongly accused player, they have basis and strong evidence, and they certainly didn't made that up.
It didn't end well, with the player denied the credential ownership that's being shown to public and made a whole lot of mess, IIRC, even tried to weaponize that fact to work into their favor, before they [accidentally and rather [un]fortunately] slipped, made a small contradictory statement that I unearthed and their scam attempt thwarted.
So, as past case told us, I don't think showing login credentials to public will be beneficial, not if that can be used by the player to twist and turn the event, to bent something to work into their favor.