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Guest User Access
For Wordpress sites, chat administrators can control if they want to give access of chat to Guest/Unregistered users also or just the logged-in users.
Now go to Settings -> Login. There is an option called Allow Guest Users. Set it to Read & Write. This will enable guest users to access chat and send messages.
To allow only logged-in users to chat and disable Guest Users, set the option Allow Guest Users to Disable.