官方详细网址：

https://docs.mongodb.com/manual/reference/method/js-user-management/

1、mongodb 角色权限的划分

1、https://docs.mongodb.com/manual/reference/method/db.createUser/index.html

2、mongodb 用户的创建

    官方网址：https://docs.mongodb.com/manual/reference/method/db.createUser/index.html#create-administrative-user-with-roles

    方式1：给产品表创建accountUser用户，并给与readWrite,dbAdmin角色

推荐使用方式。use productsdb.createUser(   {     user: "accountUser",     pwd: "password",     roles: [ "readWrite", "dbAdmin" ]   })不推荐使用方式use productsdb.createUser(     {         user: "accountUser",         pwd: "password",         roles: [{ role:"readWrite", db:"products"},             {role:"dbAdmin" , db:"products"}]     } )

use productsdb.createUser( { user: "accountAdmin01",                 pwd: "changeMe",                 customData: { employeeId: 12345 },                 roles: [ { role: "clusterAdmin", db: "admin" },                          { role: "readAnyDatabase", db: "admin" },                          "readWrite"] },               { w: "majority" , wtimeout: 5000 } )

    方式2：创建没有角色的用户

use admindb.createUser(   {     user: "reportsUser",     pwd: "password",     roles: [ ]   })

3、用户的登陆

连接客户端后，用户登陆。

用户登陆之前一定要切换到对应的数据库中，然后再登陆，否则无法登陆

db.createUser({user:"dbAdmin", pwd:"123456",roles:[{ role:"dbAdmin", db:"solar"}]})db.createUser({user:"rw", pwd:"123456",roles:[{ role:"readWrite", db:"solar"}]})use solardb.auth("rw","123456")