How to add a repo without checking key

[nojux-official]

Hello. I am trying to add to add "deb http://download.virtualbox.org/virtualbox/debian bionic contrib" repository, but I get error
-----> Apt app detected -----> Reusing cache -----> Updating apt caches Get:1 http://download.virtualbox.org/virtualbox/debian bionic InRelease [4,432 B] Err:1 http://download.virtualbox.org/virtualbox/debian bionic InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A2F683C52980AECF Hit:2 http://archive.ubuntu.com/ubuntu bionic InRelease Hit:3 http://archive.ubuntu.com/ubuntu bionic-security InRelease Hit:4 http://apt.postgresql.org/pub/repos/apt bionic-pgdg InRelease Hit:5 http://archive.ubuntu.com/ubuntu bionic-updates InRelease Reading package lists... W: GPG error: http://download.virtualbox.org/virtualbox/debian bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A2F683C52980AECF E: The repository 'http://download.virtualbox.org/virtualbox/debian bionic InRelease' is not signed.

And my Aptfile looks like this:

:repo:deb http://download.virtualbox.org/virtualbox/debian bionic contrib

shellinabox
screen
htop
tree
nano
virtualbox

So, can i add apt repo without specifying a key?

[lfr]

I was able to do this using trusted=yes, but this line no longer works now, see #84:

:repo:deb [trusted=yes arch=amd64] https://packages.microsoft.com/ubuntu/16.04/prod xenial main

Update: It's actually working, my problem was an invisible control character!