Credmap is an open source tool that was created to bring awareness to the dangers of credential reuse. It is capable of testing supplied user credentials on several known websites to test if the password has been reused on any of these.
Lets start with Check valid login credentials using Credmap
Step 1 : Just download or clone from github.
git clone https://github.com/lightos/credmap.git
Step 2 :Now you have to install it.
cd credmaplschmod +x credmap.py./credmap.py
Step 3 :Here i am using my email Id you can use any of them.
./credmap.py --email XXXXXXXXXXXX@gmail.com --user XXXXXXXXXXXX@gmail.com
Read More :- http://www.techtrick.in/description/3528-how-to-check-valid-login-credentials-using-credmap