Global NPM package installed but command not found
The executable binaries and .cmd files end up in C:\Users\<username>\AppData\Roaming\npm (minus the node_modules at the end) so adding that path to the PATH env. variable fixed the issue.
If the above method does not work then use this command to explicitly set the path
npm config set prefix c:/Users/<username>/AppData/Roaming/npm
Here more info about this topic : https://medium.com/@alberto.schiabel/npm-tricks-part-1-get-list-of-globally-installed-packages-39a240347ef0
List of packages which have been install globally
npm list -g --depth 0