shrutishrestha

do :
1. gcloud init
2. set project : export GOOGLE_CLOUD_PROJECT=your-project id

download google credential :
1. go to your project in datastore 
   i. in left menu click the api & services -> Credentials -> Create Credentials -> new service account -> download the json file
   ii. keep the downloaded json in project directory(recommended)
  
2. set project credentials export GOOGLE_APPLICATION_CREDENTIAL = path to your downloaded google credentials downloaded above