@Tanmoywifi 

Hi, thanks for posting question here.

If you forget the password of my TP-Link account, please refer to the following troubleshooting:

    1. Tap "Forgot Password" on the Login page.

    2. Please input the registered email address (very important) of your cloud account, and tap "Reset Password", you will receive an email that will guide you to reset the password.

    3. Open your email and click on "Click to Reset Password", it will lead you to a reset password page on our TP-Link cloud website.

    4. Input your new password for your cloud account and confirm, then click "Save", once you have finished the password reset steps. Now you can log in to the APP with your new password.

Or you can reset trough TP-Link Cloud website.