Adds Credentials to the ServerConfigBuiler for the given domain. 
If the domainID is NULL the domain will be pulled from the given Credentials.
- Parameters
- 
  
    | self | The ServerConfigBuiler to add the credentials to. If self is NULL, no action will be taken. |  | credentials | The Credentials to add. If credentials is NULL, no credentials will be used. |  
 
- Return values
- 
  
    | Non-Zero | (TRUE) if the credentials were added successfully. |  
 
- Exceptions
- 
  
    | Zero | (FALSE) is returned if an invalid parameter was detected or insufficient resources were available to add the credentials. |