The player who signed up gives the site the legal right to collect any user personal information once the requirement stated on the TOS and agreed upon by the player is met. I am not defending the site, just stating the obvious. Though it is a red flag to not see that the site is licensed, @Euphoriabet if you are licensed by any gambling authority, please put it on you landing page (bottom of the front page where TOS and other important link is found.
I don't think I have euphoriabet.io there is a license from any authorized gambling authority, at least at the moment, it would be posted on their website, this is posted without the necessary reminders.
we no have license
Even if an online casino is licensed and fully regulated, gamblers have a variety of personal and also objective reasons for not wanting to submit KYC information. But, in your case, this goes to another level.
Your casino is completely unregulated, meaning it doesn't offer any security for its customers. It's not even a real company, but instead a website running an unlicensed and an illegal gambling operation. You can't expect people not to be skeptical of your intentions if you aren't licensed and if your site isn't even registered under any kind of company or business name. You can't expect people to want to provide personal information in this kind of situation. The best way forward is for you to get licensed and regulated as soon as possible, but until that happens, it may be best if no one has any kind of relationship with you. Just my two cents on the matter.