Need to know where the users credentials are stored after they login through duplicate sites

[shapar]

I have landing duplicate pages of sites such as Netflix and Instagram etc. But I don't know when the users will enter the data where it will go or where it'll be stored in my system. Need help thank you!

[omy11]

You will need to be more specific with your post. Like maybe post or link the code?

[COSer]

Websites store login credentials in a database or other storage system, such as a flat file or cloud-based storage. When a user creates an account on a website, their username and password are typically encrypted and stored in the database or storage system.

An Identity Server can be a good option if you want to have a single login through multiple websites. An Identity Server is a centralized authentication and authorization server that allows users to authenticate once and then access multiple websites or applications without having to re-enter their credentials.