wp-cli-users.sh

wp user create subscriber subscriber@example.com --role=subscriber --user_pass=password --first_name=Sonny --last_name=Subscriber
wp user create contributor contributor@example.com --role=contributor --user_pass=password --first_name=Colin --last_name=Contributor
wp user create author author@example.com --role=author --user_pass=password --first_name=Arther --last_name=Author
wp user create editor editor@example.com --role=editor --user_pass=password --first_name=Edward --last_name=Editor
wp plugin activate user-switching