@MithunGowda 

Hello, which password are you referring to, the login password or the wireless password? Basically, you will be required to create a password when you initially set up the router, you may confirm again with the password you created. If you don't remember it or you cannot login with the password you created, reset the router to factory defaults then reconfigure it from scratch.
 

If you are referring to the wireless password when connecting to the C6 network, please login to its web GUI to find the password or change it:

https://www.tp-link.com/support/faq/399/