mongodb create superuser code example

Example 1: create admin user in mongodb

use admin
db.createUser(
      {
          user: "username",
          pwd: "password",
          roles: [ "root" ]
      }
  )

Example 2: mongodb readwrite to all dbs

use admin
db.createUser({
  user: '<some username>',
  pwd: passwordPrompt(),		// or '<your password>'
  roles: [ "userAdminAnyDatabase", "readWriteAnyDatabase" ]
})