Validation in app engine studio

[venkata sai alu]

How and which components are used to perform validation operation in app engine studio build apps?

[Community Alums]

Hi @venkata sai alu ,

What you want to Validate?

[venkata sai alu]

I am building an app,i want to validate username and password to enter some other page.for that how to validate existing users and how to register new users for sign and sign up.

[venkata sai alu]

and how to use the login component.