Problem with signing in

I went to garrysmod.org, clicked sign in through steam, it takes me to the page, I sign in, it says I need to enter the code from my email, but when I go to my email account, I don’t have the code anywhere… can someone help me with this? I clicked on What Code? it said check spam folder, not there either, I click on Still no luck, it has a link to a steam support topic, I do what it says on there, but I still get no code… can someone tell me what to do with this problem?

Check your settings on Steam to make sure the email registered under your steam account corresponds with the one you are checking.

it is… this problem didn’t start until today

I guess you could momentarily turn off Steam Guard and then try (through your options in Steam)