Issue with passwords and outside brands

Hello. I have several accounts with different outside brands (including CT) using different email addresses and am hoping to put them all into one account. Is there a global password management system I could access (possibly through an email to an actual person?) I could send to that would bring them all together? I can list out all the accounts. Thanks for any guidance here.

You could use a password manager like 1Password. That would give you a single login to access all sites, but it doesn’t resolve your email problem.

Some sites allow you to edit the email, but you would need to do it one site at a time.