Using corvid code how we can read file content like can read csv file and insert those values into member table?
I think the closest tutorial will be this one as it explains how to import/export data from/to CSV files:
Corvid Tutorial: Importing and Exporting Collection Data with Code
The Wix native members table “Members/PrivateMembersData” is a read-only collection.
You cannot insert values into or add or delete fields
You need a custom site registration using your own members table to access that way.