Identify the following users as either an Internal user or an External user. $[[$Accounting information user,$[[$External user or$],[$Internal user$]]],[1.$ Human resources executive,Internal user$],[2.$ Shareholder,External user$],[3.$ Production supervisor,$],[4.$ Customer,$],[5.$ Business press,$],[6.$ SEC regulator,$],[7.$ Ingredient supplier,$],[8.$ Creditor,$]]$