Deleting all internet cookies/history/passwords for the steam client browser, my local PC's browser, uninstalling/re-installing steam, checking port forwarding on my router, etc. I created a dummy account and was able to authenticate without any issues. I verified it was an account issue as I tried logging in even from my cell phone's browser without being connected to wifi so I could be sure I was using the cell network to rule out local network or client issues. I could not submit a support ticket due to this problem as it would again try to do the login verification and say it could not reach a login server. Also Im pretty sure this has nothing to do with internet connection since fiber to the home is used. However, it is always unable to verify and login but if I exit the client and reopen it and login I am able to do so with no problem. I'd authenticate and put in my steam guard code but it would just go back to the login page (steam client would authenticate and show me logged in). When I disconnect from the network steam has to verify login information. In fact, in my case I could not even log in to steam via a browser. I was able to log in to steam from the client but my wishlist was inaccessible, I could not buy games due to the login verification popping up and failing, etc. In case anyone else is searching the web and finding all the solutions provided didn't work for them, I had a completely separate resolution: I had to remove steam guard and re-add it.
