Refactor: State tokens to a serializable array

[tuliomir]

The next version of Redux throws an error by default whenever there are non-serializable objects in its Store ( more about this on this article ). This PR is one in a series of PRs that aim to refactor all of those instances before the upgrade.

Acceptance Criteria

• Tokens state on Redux must be serializable

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.