Extract response data and save to env file?

[cnshenj]

Using OAuth2, I don't want to create a new access token for every every request - because an access token has several hours of lifetime so I want to reuse/share it until it expires.

Is it possible to extract/save response data (the access token) to the env file so I don't have manually:

1. Find it in the response
2. Copy it
3. Open the env file
4. Paste it

[cnshenj]

Also, how do I specify a "common" part to be applied to each request in a .pyr file without specifying it in each request?
For example, I'd like to add the Authorization header to each request. But I don't want to repeat it in each request.