https://www.wpar.net/how-to-manage-members-permissions-in-wordpress/%d8%b2%d8%b1-%d8%a7%d9%84%d8%aa%d8%b3%d8%ac%d9%8a%d9%84-%d8%a7%d9%84%d8%b0%d9%8a-%d9%8a%d8%b8%d9%87%d8%b1-%d8%b9%d9%86%d8%af%d9%85%d8%a7-%d8%aa%d8%b3%d9%85%d8%ad-%d9%84%d8%a3%d9%8a-%d8%b4%d8%ae%d8%b5/