Do you share your passwords to your wife/husband? If yes, Why?If no, Why?
While trust is important for relationships, it's also important to respect boundaries. If your partner is getting upset that you won't give them passwords into various things that's actually a big red flag.
I learned the hard way that it's not always good to share passwords. My roommate is a long-time friend who may as well be my spouse at this point and I gave him the main password into my computer in case of an emergency situation. Not so he could look in on my accounts and such, but so in case I was in the hospital or dead or something he could go in and make sure all my accounts were properly taken care of and people I care about who have no other contact with me can be alerted so they're not left in the dark.
And yet last year we had a major fight, I was in a bad place and I ended up checking myself in to a mental health facility for a few days. During that time he used the information I had given him to go into my computer and look in on conversations where I had been complaining about his behavior leading up to this fight with people. Just venting to get it out and getting advice about what to do because I was unsure, which I feel is perfectly valid and safe.
Instead of accepting this behavior, however, he decided that it was unacceptable and overreacted about the whole thing and it was all in all a pretty bad situation. I have since changed the password on my computer, as I have no choice but to stay with him for the moment, and I make sure my computer is locked before it is ever out of my sight. He gets angry about it but I refuse to let him back in because I trusted him and he broke that trust and so now I have to set the boundary that no, he is not allowed to do that anymore.
There's trust and then there's having a healthy boundary to have to do with your social media and personal accounts that you don't want them messing with and those are not the same thing by a long shot.