I think that's a nice question from op, because I have been mean to ask this question about this otp I know the full meaning of otp is one time password but my question is that how can one generate this one time password? Or does it mean that they are going to send it through email or sms because I don't really understand that otp
It is on your device with installed 2-factor authenticator application.
This guide is written with Google Authenticator application for example, but you can use other applications, open source like Aegis.
Aegis Authenticator, a decent alternative to Google Authenticator and Authyhttps://getaegis.app/