How to get rid of that "Cancel" button

Anybody used Mikhmon here as radius/userman replacement? Anyway, I am using a template but apparently, that “Cancel” button seems a problem to me. Is that from my smartphone OS or from Mikhmon? I can not locate it in the code.

OnCancel, it keeps the WiFi alive for the user rather than kick the user out. First of, its a portal and there shd be no IP at this time until the user has logged in successfully. Can anybody point me where can I set that to “false” somewhere in the code?

Thank you.
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Ask Mikhmon, this is not a MikroTik product or problem.