connect to mongodb with username and password
->First run mongoDB on terminal using
mongod
->now run mongo shell use following commands
    use admin
db.createUser(
  {
    user: "myUserAdmin",
    pwd: "abc123",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
)
->Re-start the MongoDB instance with access control.
mongod --auth
->Now authenticate yourself from the command line using
mongo --port 27017 -u "myUserAdmin" -p "abc123" --authenticationDatabase "admin"
->You can read it from
https://docs.mongodb.com/manual/tutorial/enable-authentication/
