Officially, if you already have your permit, when you go to renew, you will need to attest that you are not this:

>>You are an unlawful user of or addicted to any controlled substance (as defined in the Controlled Substances Act (21 U.S.C. 801, et. seq.).

So while legal in the state, it's still federally illegal at the moment. This might change with the latest bill sent to Biden to sign though.