Problem Ionc-cloud setup

I want to integrate ionic push notification to my ionic app.
for that i was reading ionic-cloud documentation in this i am having error in first step.

npm install @ionic/cloud --save
npm ERR! addLocal Could not install ionic/cloud
npm ERR! Error: ENOENT, stat ‘ionic/cloud’
npm WARN package.json callsite@1.0.0 No repository field.

wrong package!?

npm install @ionic/cloud-angular --save

not npm install @ionic/cloud --save