How to run forever monitoring?

[#1]

When I try to run forever monitoring, it asked the key, but there is flag to pass the key.

[edge@bns .edgemicro]$ edgemicro forever -f /usr/lib/node_modules/edgemicro/forever.json -a start

current nodejs version is v6.14.3

current edgemicro version is 2.5.25

key is required

[edge@bns .edgemicro]$ edgemicro forever --help

current nodejs version is v6.14.3

current edgemicro version is 2.5.25

Usage: forever [options]

Start microgateway using forever-monitor

Options:

-f, --file <file> forever-monitor options file

-a,--action <action> action can be start or stop; default is start

-h, --help output usage information

Documentation does not mention the key. How to use forever monitoring in edge micro gateway?