@VD ,
From Microsoft Teams side, you can create deep links to private chats between users by specifying the set of participants.
Use this format for a deep link that you can use in a bot, connector, or messaging extension card:
*https://teams.microsoft.com/l/chat/0/0?users=\<user1>,<user2>,...&topicName=<chatname>&message=<precannedtext> *
As we are mainly responsible for general question of Microsoft Teams, your requirement related to development is not supported by us. I will add office-teams-app-dev tag to get more efficient support. Thanks for your understanding.
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