Store Custom Data on Lithium.

Suchith - A custom field needs to be created for this, which the Lithium PS will create. You will then need the API to store the data in that custom field. Here are a couple of threads to give you context of how it works.

https://lithosphere.lithium.com/t5/Developer-Discussion/Storing-Custom-user-data/m-p/114473#M4226

https://lithosphere.lithium.com/t5/Developer-Discussion/Changing-Custom-Profile-Fields/m-p/137860#M5345

I hope this helps.