saleem - 2019-01-12

im getting this error

sudo apt update
Get:1 http://apt.sharklinux.net/repo/apt/main/debs InRelease [1,724 B]
Err:1 http://apt.sharklinux.net/repo/apt/main/debs InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7524FB6A2EECF33A