When your Admin account is created, a password is usually chosen for your account. It is strongly recommended that you change the password on your Admin account for security reasons. After logging into your Admin account, click the drop-down menu in the top-right corner (next to "Welcome") and click "Profile." From the new menu, you can change the password for your Admin account.
Note: if you are accessing your Lab-Aids Portal account from Google Classroom or your school's LMS, you cannot change your password.