edit confirmation email to new registerd users

i’m putting on a blog and i wanted to edit the link which is sent to new users who decide to register on my blog.
i came found this in my theme.
ps am using wordpress

<a href="'.get_permalink($post_classifiedad_id).'">'.get_permalink($post_classifiedad_id).'</a>';

this takes them to the post they have made on the blog and not to their user profile. can anyone help me?
thanks

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