After you register and activate your new account, Login with username(email) and password.
To register with Stall.sg, you need to have an email account. Go to Register page and follow the instruction to create the account. You need to activate the account before login.
Click Forget Password link in the login page. Simply enter your email to retrieve a password via email.
After login the website, go to My Account -> My Profile to update your personal information.
After login the website, go to My Account -> Change password to update.