Hello harendra,
If we understood correct that means, you are looking for the single session from multiple resources?
For example: If User A registered with his email id a@gmail.com using the username and password option and later on he wants to link his social account. And once he linked his account, he can login either using the username/password or using the social account.
Let me know if our understanding is correct, it will help us to provide better support to you!
Regards,
Himanshu Sharma