Greetings,

I hope you are having your application number, You can just mail the authorities with your application number and mentioning that you have forgot your login credentials and they will reply back to you within one or two days with your User ID and Password.

here is the support E-mail for the KCET - keauthority-ka@nic.in (mailto:keauthority-ka@nic.in)

and if any queries you can reach them out at this number 080 - 23460460

hope this is helpful thank you