Function init

init(credentials: Credentials, debug?: boolean): void
Initializes the feedback filter logic. The filter disables all listed superiors (a link) with the status 4 in statoverall
```
"<script language='javascript' type='text/javascript'>$(document).ready(function() { ssxlib.feedback_filter.init('" + string({ user: 'encrypted_username', password: 'encrypted_password' });})</script>"
```
Parameters
- credentials: Credentials
  An object containing the encrypted credentials for a SX user with access rights for the survey and for the folder the survey is saved in. Obtain the encrypted credentials from jan.bladt@syspons.com.
- debug: boolean = true
  optional, if set to true, console infos will be written
Returns void