Encrypt and decrypt the email and user in the cookie

[costelmoraru]

Description

This change does one thing:

• if a cypher is provided, it encrypts also the email and user with the same logic and algorithm as the rest of the fields from the session state.

Motivation and Context

This is the PR for the issue #60 .
Don't expose any information part of the cookie, information that can be easily retrieved if not encrypted.

How Has This Been Tested?

All the test from session_state_test are passing.
Testing in our environments.

Checklist:

• My change requires a change to the documentation or CHANGELOG.
• I have updated the documentation/CHANGELOG accordingly.
• I have created a feature (non-master) branch for my PR.

[JoelSpeed]

You may want to hold on this as there will be massive conflicts with #63

[JoelSpeed]

#63 Has now been merged, @costelmoraru do you think you could modify the PR to work with the new changes that are in master?

[costelmoraru]

Hi @JoelSpeed , I had a very busy week, but sometime this week I'm make time to adapt the changes and modify the PR.