`zowe config init` prints out `undefined` if there are no additional details

[zFernand0]

Command Output:

zfernand0:~/gh/demo$ zowe config init
Warning:
Unable to securely save credentials. Skipped prompting for credentials.

undefined

Saved config template to /home/zfernand0/gh/demo/zowe.config.json

Source: https://github.com/zowe/imperative/blob/3142b97db3e3e21830c5cef0219951f57d880cf3/packages/imperative/src/config/cmd/init/init.handler.ts#L98-L99