This plugin is a very simple "replace all with token" for a group of requests. Given a group of requests with authentication set as template var token, the group action will replace the token with what you have in clipboard.
This plugin is a very quick and dirty hack I needed overnight. However, I also learnt something about INSOMNIA plugin system while messing up with request hooks and actions. If, for whatever reason, you find it useful and want to try it just clone this repo in Plugin File Location.
Add a template variable in the request (please note, there are no checks ATM) called token (ctrl + space). Then use the group action dropdown menu and choose Replace all tokens from clip.