A bash script to create a user with readWrite role on the social database

userDefinedRole-createReadWriteUser.sh

mongo admin --port 28000 -u user -p password --authenticationDatabase admin <<EOF
db.createUser({user: 'app_user', pwd: 'password', roles: [{role: 'readWrite', db: 'social'}]})
EOF

# The output of above command
# MongoDB shell version v3.6.2
# connecting to: mongodb://127.0.0.1:28000/
# MongoDB server version: 3.6.2
# Successfully added user: {
# 	"user" : "app_user",
# 	"roles" : [
# 		{
# 			"role" : "readWrite",
# 			"db" : "social"
# 		}
# 	]
# }
# bye