Hi @guidodonato,
Welcome to the Auth0 Community!
I understand that you are looking for a way to prevent multiple logins.
Before we continue, could you please clarify what you meant by “prevent different people from using the same login credentials”?
Generally, login credentials such as a username and password combination are only known to a single user. Is there a reason why multiple users may share the same login credentials?
Yes, this is something you can do to the user profile.
Looking forward to your reply.
Thank you.