How to add mega repo in Arch Linux

How can I add the Mega repository to Arch Linux? Already add this in my pacman.conf [DEB_Arch_Extra] SigLevel = Required TrustedOnly Server = https://mega.nz/linux/MEGAsync/Arch_Extra/$arch But I am getting this error: ❯ nocorrect sudo pacman -Syyu [sudo] password for scarlet: error: DEB_Arch_Extra: signature from "MegaLimited " is unknown trust :: Synchronizing package databases... kde-unstable 122.0 KiB 74.2 KiB/s 00:02 [#######################################################] 100% gnome-unstable 45.0 B 109 B/s 00:00 [#######################################################] 100% core 136.5 KiB 136 KiB/s 00:01 [#######################################################] 100% extra 1569.9 KiB 716 KiB/s 00:02 [#######################################################] 100% community 5.8 MiB 1737 KiB/s 00:03 [#######################################################] 100% multilib 148.2 KiB 136 KiB/s 00:01 [#######################################################] 100% archzfs 14.1 KiB 16.4 KiB/s 00:01 [#######################################################] 100% DEB_Arch_Extra 3.1 KiB 2.51 KiB/s 00:01 [#######################################################] 100% error: DEB_Arch_Extra: signature from "MegaLimited " is unknown trust error: failed to synchronize all databases (invalid or corrupted database (PGP signature)) /17.4s My system: ❯ uname -a Linux lenovo 5.15.3-arch1-1 #1 SMP PREEMPT Thu, 18 Nov 2021 22:23:08 +0000 x86_64 GNU/Linux /0.1s What I have tried: - I found this issue-with-signature-from-mega-deb-arch-extra-fails-to-update but I can't try the suggested solution since I can't install Manjaro keys on my Arch system (or can I? I am not sure): This is possible solution suggested - don't want to use AUR because it fails to build - the binary AUR though installs successfully lacks plugins support - plugins in separate AUR are outdated