Login Invite Link to Users who are already created but being mapped to a new Organization

When we send invitation to users, we see the signup screen for users who are already created but are going to be mapped to a new Organization. After populating the password, we get an error that user is already present.

So, I think the best way to resolve this solution is directly make the user land in the Sign In/ Log In page by sending a link in mail.
But we dont know how that can be done!