Post of authentication
joined bounty:
1. FACEBOOK : https://www.facebook.com/trannguyenthanhchuong83
2. LINKEDIN : https://www.linkedin.com/in/tran-nguyen-thanh-chuong/
3. STEEMIT : https://steemit.com/@chuongtnt
4. INSTAGRAM : https://www.instagram.com/chuongtnt8055/
5. REDDIT  : https://www.reddit.com/user/chuongtnt8