Create group access to firebase storage without using custom authorization

Question

Is there a way to control uploads to a path in Firebase Storage by group? For instance have an admin group that can upload anywhere or a team that can only upload to a certa

Answer 1

I don't have enough reputation to comment on @ecalvo's answer. So I am adding an answer. The function isAdmin() can be provided a list as following:

function isAdmin() {
   return request.auth !=null && request.auth.uid in [
        "uidAdmin1",
        "uidAdmin2",
        "uidOfOtherAdminsAsCommaSeparatedStrings"
    ];
}

Rest of the implementation can be borrowed from the answer of @ecalvo. I feel now it is more clear. In the answer of @ecalvo, I was confused why should I give username when I have to compare only uid.