I follow that you write. But when I run node index.js the console log return this error

Error: Cannot find module ‘babel/register’

at Function.Module._resolveFilename (module.js:325:15)

at Function.Module._load (module.js:276:25)

at Module.require (module.js:353:17)

at require (internal/module.js:12:17)

at Object.<anonymous> (/Users/ortiz/Siti/tutorial/graphQL/graphql-intro/index.js:1:63)

at Module._compile (module.js:409:26)

at Object.Module._extensions..js (module.js:416:10)

at Module.load (module.js:343:32)

at Function.Module._load (module.js:300:12)

at Function.Module.runMain (module.js:441:10)

how can I fix it?