i want to add otp based authentication for my mobile application

i just started with outsystem since last week and I want to add otp based sign-in feature for my users please help me with step-by-step guid. 

Hi Rahul,

Welcome to the OutSystems community. 

Regarding your question on one-time-passwords, there are older posts:

There are also Forge components

But before you start to have a look at the above links, I would advise you to follow one of the guided paths on the OutSystems learn site. This will really accelerate your OutSystems knowledge and your ability to develop OutSystems applications.