Key error

I am getting below error when i type (https://kite.trade/connect/login?api_key=cmhaljhx2p7xorfb&v=3) on my browser.
{"status":"error","message":"Invalid `api_key`.","data":null,"error_type":"InputException"}

I am logging after couple of months so not sure if the app is deactivated. If so, please let me know how to reactivate