Invalidate JWT after 5 minutes

### Expected Behaviour

Once a bearer token has been generated the JWT token should be invalidated so it can't be re-used.

### Actual Behaviour

The JWT token expires after 24 hours which is nice in testing but not so much in production.

### Reproduce Scenario (including but not limited to)

#### Steps to Reproduce

Just generate a bearer token

#### Platform and Version

Any version up to 0.2.0.

#### Sample Code that illustrates the problem

Use sample code from readme.md