1. Prepare your membership template, can download from here
https://docs.google.com/spreadsheets/d/1166tzbtZDgbpxpmiTokSdwh1vnMdTB0W/edit?usp=drive_link
2. Go to website click import
3. upload your file
4.after import, the data will show in here
5. if you just want update something , you just need carplate and what you want to update (can refer this template)
https://docs.google.com/spreadsheets/d/17nxklLmZ1PSpZjZ2jGshqhdVp8p5u14E/edit?usp=drive_link