Use this command to create the service account:

gcloud iam service-accounts create test-service-account2 --display-name "test-service-account2"

Note: If you see the following output, type y and press ENTER

Now if you go to the Navigation bar and then IAM & Admin and then Service accounts, you can see out service account:

Also we can give it a role using command line. For example, lets give this service account the project viewer role:

gcloud projects add-iam-policy-binding $GOOGLE_CLOUD_PROJECT --member serviceAccount:test-service-account2@${GOOGLE_CLOUD_PROJECT}.iam.gserviceaccount.com --role roles/viewer

Done!