Boyfriend changed his Netflix password before sharing it with me, red flag?

So money is a bit tight for me right now so I cancelled my Netflix and my boyfriend offered to let me use his login, which made me happy, but before he gave it to me he sat down at his PC and changed the password, I asked him why and he said because it's the password he uses for majority of his accounts and doesn't want to hand that one out, it covers his email, facebook, banking etc, but if he had nothing to hide then he should have ZERO problem sharing it with me right?

Boyfriend changed his Netflix password before sharing it with me, red flag?
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