Infosms short message shows changing password.

I would like to ask what is the reason for the change of infosms SMS password? Infosms SMS shows that the reason for changing the password is

1. When you receive a short message from Infosms that needs to change your password, it is usually because your account has security risks, or the system requires you to change your password regularly to improve the security of your account.

2.Infosms is a service to send short messages. If your account password is known by others, your personal information will be leaked, your short message will be tampered with or other security problems. In order to protect the security of your account and personal data, the SMS system will regularly prompt you to change your password.