Error: Cannot find module 'openbci-ganglion'

[asadullah01]

Hello everyone,
I do all the things as told in instructions
installed all the prerequisites
but when i try to run this command in in Node js const "Ganglion = require('openbci-ganglion');"
it syas
Error: Cannot find module 'openbci-ganglion'
i had installed the openbci-ganglion module and it is showing in list of modules using
npm list -g --depth=0