Technic Login Not Working and Modpacks not working as well

[NuclearTohru]

So my BF is having a problem with technic. He's trying to log in to the Launcher and it wouldn't let him in. It keeps saying that it wasn't the right password when he only knows the one he's using. Also When he tries to get into any one of his packs he has it goes into the negatives. Then also the pack just won't even open as well. As well as When he made an attempt to play a pack it wouldn't even have any mods in it. I've been trying to look things up to try to help with his situation but nothing is working. Is there anyway that I can help him fix his technic?