Refresh JWT when required to stop it expiring

[ianbarker]

I've noticed that a long running app's token will expire. The API docs state that the token lasts for 24h so this PR should allow a refresh every 12 hours thus stopping it expiring.

[edwellbrook]

Hey Ian! Thanks for taking the time to put together this PR. I think this will make a great addition to the library! 😄

Could we implement this a slightly different way?

• Offer a public option to enable/disable refreshing automatically — I think having this enabled by default would be sensible :)
• Instead of generating our own expiration timestamp, can we just read the expiration date from the JWT? (see below)
• Instead of refreshing every 12 hours, only refresh when needed, based off the expiration date on the JWT.

You can get the expiration date from the JWT by:

• Splitting the token into three parts by the "." character. The 2nd part contains our JWT payload.
• Base64 decode the 2nd part and JSON.parse to get the payload object
• The "exp" key contains the token expiration, which can be stored and checked against.

Cheers, and let me know if there's anything I can help with!

[ianbarker]

Ok, good idea. I'll make those changes and update the PR

[ianbarker]

Ok, I've updated the PR so that the token will refresh using the exp property of the JWT payload.