Merge branch '28517-discover-by-userid' into 'master'

Allow discover by userid - issue 28517

Closes #28517

See merge request !12314

lib/api/internal.rb

@@ -71,11 +71,16 @@ module API
       end
 
       #
-      # Discover user by ssh key
+      # Discover user by ssh key or user id
       #
       get "/discover" do
-        key = Key.find(params[:key_id])
-        present key.user, with: Entities::UserSafe
+        if params[:key_id]
+          key = Key.find(params[:key_id])
+          user = key.user
+        elsif params[:user_id]
+          user = User.find_by(id: params[:user_id])
+        end
+        present user, with: Entities::UserSafe
       end
 
       get "/check" do