The query author authentication tool is available in Horizon.
The contract Requester authentication https://ankhorizon.com/transaction/6157d07a-ed4f-4410-852c-9faa90883c7e
All related contracts have been updated - https://ankhorizon.com/contracts.
At the moment, authentication is carried out after each authorization of those users who have personal chains on mobile devices.
Authentication will also be used by default when performing actions with personal data, performing operations in groups, sending messages, downloading documents, signing agreements using dynamic digital signatures and performing other critical actions.
The query author authentication tool is a must to run other tools.