Hi, I have installed this plugin and added verify email on signup. however, it's working fine. but the problem is I don't want email verification for the previously/existing accounts. I am unable to login to previous accounts
Welcome to our forum.
Not sure if you are using a custom login form, if you use the default login form you will see an error message with the resending verification link, you can click on this link to get a new verification mail to get verified. the same way your existing users will need to get verified first before login into their account.