Hello guys! I'm currently investigating, but I'd like to ask here as well, is it possible to detect the very first login by an user after signing up only from the client side?

Hi Luz, this could be solved by adding a trait named e.g.

isNewUser

that is false by default and updated by the UI when appropriate. See https://www.ory.sh/kratos/docs/concepts/identity-user-model/

Yep, that is the alternative I figured, thank you!