Allow permissions/locations to be set during development

[teneightfive]

Problem

During local development it is often required to use different permissions or a mixture of different permissions to perform and test particular actions within the application.

Currently the way to do this is to set the permissions required as an environment variable. But this then makes it hard to see what permissions are currently set or to switch them around.

Possible solution

Support some form of session injection to be able to update the current set of permissions via the interface during local development.