Are you referring to this?
https://docs.rapid7.com/insightvm/enable-insightvm-platform-login/
This guide walks through how a user can enable the console + cloud features as a single consolidated view.
Alternatively, if your users have both a console and a platform account with the same email, a global admin can run a command on the console RUN page to enable the login feature for each user. The command is:
platform-login enable username
With the username part replaced with the user’s console account username.