Answers for "create user for trong mongodb database"

mongodb add user

use <your database>
db.createUser({
  user: '<some username>',
  pwd: passwordPrompt(),
  roles: [{
    role: 'readWrite',
    db: '<your database>'
  }]
})

mongodb create database with username and password

use mydb
db.createUser(
   {
     user: "myuser",
     pwd: "mypassword",
     roles: [ "dbOwner" ]
   }
)