It would appear that White House Press Secretary Sean Spicer has tweeted out a password of some sort. It's exactly 8 characters, a mix of letters and numbers, and it's not the first time he's done it.
Just the other day, he did the same thing.
It could absolutely be a coincidence, but keep in mind the minimum password length on Twitter is six characters.
Don't try to break into his Twitter account, even if this is/was his password. His staff has likely already changed it and breaking into the account is illegal.