#创建数据库
use mydatabase
#创建用户
db.createUser({
    user: "myuser",
    pwd: "mypassword",
    roles: [
        { role: "readWrite", db: "mydatabase" }
    ]
})
#授予用户权限
db.grantRolesToUser("myuser", [{ role: "readWrite", db: "mydatabase" }])