The "grafana-image-renderer" plugin is unsigned

After following the installation documentation here:
Using the grafana-cli to install this plugin, then using the additionnal instructions for the additionnal dependencies from here: (ldd doesn’t display any missing dependency)

The plugin appear in my grafana installation but it display the plugin as “Unsigned”, so is the plugin really unsigned? (It’s from Grafana labs!) and I need to allow it in my grafana.ini or is there a problem with my installation of this plugin?