php - Create users manually yii 1.1

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I have been given a website made with yii 1.1.1.4 and i want to create new users. The issue that i can only create these users manually because there is no registration form. I have tried creating these users using the following line of code to get a hashed password and then add this password to the database along with the other user credentials (username and email). The problem is that when I try to log in with the correct credentials I get an error. What is the correct way of adding a new user manually? The code i used in order to get the hashed password is:

$newPassword = '123456as';
$hashedPassword = CPasswordHelper::hashPassword($newPassword);