Improve the script to generate jwt (#5297)
Improve the script to generate jwt (#5297)

* Fix doc

* Revert code change to pass test

geeknoid/istio,smawson/istio,smawson/istio,istio/istio,smawson/istio,frankbu/istio,geeknoid/istio,geeknoid/istio,frankbu/istio,geeknoid/istio,istio/istio,smawson/istio,frankbu/istio,istio/istio,geeknoid/istio,frankbu/istio,smawson/istio,frankbu/istio,frankbu/istio,smawson/istio,istio/istio,istio/istio,geeknoid/istio