It’s not meant to be a logic puzzle.
Just take a moment to think it through.👍
It's a link to an account with nothing hat related on it.
Unless it's some pun related to Hatsune Miku, in which case I tried putting that in to no avail.
If it's supposed to be the name of the account, I tried putting in capital I and lowercase L without spaces into the password box already and neither worked just in case it's either.
If it's supposed to be the name of the emoji in the AI-generated videoGIF above said link, then I've tried relieved and relievedface as well already.
I even tried out something as literal as the sentence itself without spaces.
So yes, I had to conclude it's some inside joke.
Oh nevermind, apparently there was an INVISIBLE SPACE on my password box everytime I type stuff into it for whatever reason.