What should I do to atone for the sin of stealing an account when I could not find its owner to return it to him after my repentance and remorse?

Social media is a double-edged sword. Whoever utilizes it for obedience to Allah and spreading good has shown gratitude for His blessings. But whoever uses it in ways that displease Allah has been ungrateful for the blessing. Allah Almighty said: "And [remember] when your Lord proclaimed, 'If you are grateful, I will surely increase you [in favor]; but if you deny, indeed, My punishment is severe.'" (Ibrahim: 7).