Bought Stockholm Theme .. where do I find license keys for included plugins?

Its not given in the slider-revolution-responsive-wordpress-plugin-license.txt

The line "Item Purchase Code: " does not hold the code.
Same is true for all the other included plugins.

Thanks for your help

Bundled themes don’t come with purchase codes to “activate” access to automatic updates etc. https://help.market.envato.com/hc/en-us/articles/213762463-Bundled-Plugins

Plugins will still work as required for the theme and the theme author will update the theme package including the latest version of any plugins when there are updates