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Revoking steam api key :: Help and Tips
steamcommunity.com › discussions › forumOct 31, 2018 · Please follow the next steps to prevent the damage" and listed "1. Change your password in Steam account settings 2. Revoke the API Key issued by scammers. 3. Create new trade URL 4. Please be careful when a third-party site asks for your Steam credentials (login, password) as it is the most prominent form of hacking into accounts."