Inherited sites on yii, both the first and second
All known at least one working log and pass
You need to change all passwords
Do not tell me the user manual for "complete beginner" where and how is it done?
If the site provides a password change, there is change.
If there is no change, but there is register, create a new user in the database set need to this user, and the administrator will delete it.
Yes, a lot of options, depending on what and how You do it is generally made
Henderson_Beat answered on June 27th 19 at 15:00
yii is a designer. He made You known only by Your developer.
What to do? The best option is to go freelance, to find a specialist to put the problem and pay for its implementation.