Default token_lifetime not really 5 seconds

[jonsgreen]

It seems that the default is being set to 5000 seconds instead of 5? Fortunately this can be overridden but it is a bit deceiving.

p.s. Thank you for this terrific middleware

[ahamid]

Hi jonsgreen, thanks for catching this. For some reason I never got notices for issues on this repo, so sorry for the belated reply.