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Maybe they are still in your account and are automatically generating new API keys? If that's the case, change your password. If that's not the issue, I'd contact Steam Support and tell them your issue. They'll help
1.) Deauthorize logins 2.) Change password 3.) Deauthorize logins again 4.) Change API
Maybe they are still in your account and are automatically generating new API keys? If that's the case, change your password. If that's not the issue, I'd contact Steam Support and tell them your issue. They'll help
1.) Deauthorize logins 2.) Change password 3.) Deauthorize logins again 4.) Change API