Hello Pratik,
I am sharing a simple app to show you how the login and user registration workflow in an AppStudio app, reading and writing SQLite database to save user information, see attached for source code. This is based on this blog post and then converted into AppStudio apps.
Also, we have another sample that shows you how to handle social media login, for example Google and Facebook logins, see attached for source code.
Apart from having the source code of the above two apps attached in this post, they are also shared publicly and available to be tested in AppStudio Player by searching in Public apps.
And lastly, we also have a lot of individual samples such as SQL, Secure Storage and Biometric Authentication available in AppStudio Desktop and Player that you can use to enhance the login experience.
I hope this is useful,
Erwin.