> use admin

switched to db admin

> db.system.users.find()

{ "_id" : "admin.admin", "user" : "admin", "db" : "admin", "credentials" : { "SCRAM-SHA-1" : { "iterationCount" : , "salt" : "+g1F+At5S9rC9fqIyHxDzA==", "storedKey" : "FOt1FE9+LqbcTQamwceQwULGJbY=", "serverKey" : "qZQWdSuYpH3E7k5GP30COrPqqZ8=" } }, "roles" : [ { "role" : "userAdminAnyDatabase", "db" : "admin" } ] }

{ "_id" : "demo.myuser", "user" : "myuser", "db" : "demo", "credentials" : { "SCRAM-SHA-1" : { "iterationCount" : , "salt" : "rGTxEaSNry22EOFnjaAjAw==", "storedKey" : "/kWOpCEWm+iI/ESecqy2JkIXJFo=", "serverKey" : "A66NeaeGo8XhwgrKKeD0ASEN0Uc=" } }, "roles" : [ { "role" : "dbOwner", "db" : "mydb" }, { "role" : "readWrite", "db" : "mydb" } ] }

> use admin

switched to db admin

> show users

{

        "_id" : "admin.admin",

        "user" : "admin",

        "db" : "admin",

        "roles" : [

                {

                        "role" : "userAdminAnyDatabase",

                        "db" : "admin"

                }

        ]

}