I googled Rockstar's customer service number, because they've hidden it on their website. Well, it says 'Nickname/Email', so I'll try my social club email.
Even more strange, it worked, but the launcher didn't. I load it up and I'm already logged in, so I log out and log right back in - with the same copy/pasted password from earlier. I'll try the rockstar social club site to be sure I'm not hacked like many others.
To avoid any errors in my password, I typed it into a notepad and copy/pasted it into the login, still wrong. Well that's weird, caps isn't on, my username doesn't have a typo, and I'm sure I typed my password correctly.
Then it stops and tells me I have to log in again so I do, and it tells me my information is wrong. This morning I felt like playing some more GTA V on my PC, so I load it up, and the launcher does it's thing. Sorry if this is the wrong section, I'm not sure if it's more suited for a different section because it's about Rockstar Social Club, or this one because it's about PC gaming.