I first joined the StackExchange network by signing up on StackOverflow with my Google account.
Then I joined some other sites of this network, and I decided to stop using my Google account to login.
I want to have a proper StackExchange account in order to login even if I delete my Google account.
I already check
my profile > my logins > add more logins > More logins options but you could not add a StackExchange login from there.
How do I create a StackExchange account that will link all the sites I already joined?