JWT functionality

[jmelchio]

Summary:

Need the ability to create a JWT (json web token) to return to a user when logging in to the system.

Details:

• Create new token upon login. Token should contain a username and TTL at least. May need to have an indicator to indicate if the user has special privileges.
• Check token when making requests and return code that indicates the need for a login request when the token is missing or has expired.
• Do a token refresh when requests come in with valid tokens. Tokens should have a short TTL but refresh should be automatic in most cases.
• Provide a wrapper http handler to provide the token check and refresh.

See Article for sample code.