I was going through Logs of my Router for checking issue with my Wireguard Server not connecting and for some reason i found my Login Credentials in plain text log file. 

Wed Mar 25 17:38:51 2026 daemon.info cloud-client: send to fd:7, type:64, message:{"request":"{\"method\":\"deviceAccountLogin\",\"params\":{\"cloudUserName\":\"myemailid\",\"cloudPassword\":\"PasswordinPlainText\",\"deviceId\":\"RandomID\"}}","timeout":5000,"flag":1}

I would likely ask the TP Link Developers to make sure the password stored in logs is encrypted.