Google Classroom Passcode

1. Login to Google Suite (Education) https://admin.google.com

2. “Device management” > “Password Settings”

3. Then uncheck the box labeled “Require users to set a password”

Source：https://support.google.com/a/answer/6328679?hl=en#zippy=%2Cless-secure-option-not-recommended-turn-off-password-requirements