Proof of Authentication
Bitcointalk username:  Inna439
Bitcointalk profile: https://bitcointalk.org/index.php?action=profile;u=1876716
Campaign: Content
ETH address: 0x489D69939b4Aca357f630055e351A81F1Fbb7Fb6
Article link: https://innapavlova439.medium.com/invest-in-gold-with-digital-gold-91e62b146f87