You can setup or edit your profile page on both the FairPrice Group app and website, just follow the following steps:
FairPrice website
1) Select "Account" button at the top right corner of the page
2) Select "Manage profle in Linkpass"
3) Edit the desired fields and save the changes
FairPrice Group app
1) select the account button at the top left corner of your screen
2) Select "Edit profile" at the top right corner of your screen
3) Edit the desired fields and save the changes