Support OP_SESSION_subdomain environment variable?

[mriska]

Hi,

Thanks for a great plugin!

Instead of demanding that the user sets up the following environment variables:

• OP_EMAIL
• OP_PASSWORD
• OP_SECRET_KEY
  would it be possible to read the session token from OP_SESSION_subdomain which the op cli tool instructs the user to export?

I would be willing to giving implementing it myself a try, but I have never worked in go, so I am not sure if I would be able to pull it off without help.