password_lookup
Description:
Lookup a password in the secret service.
The variable argument list should contain pairs of a) The attribute name as a null-terminated string, followed by b) attribute value, either a
      character string, an int number, or a gboolean value, as defined in the password schema. The list of attributes should be
      terminated with a null.
If no secret is found then null is returned.
This method will return immediately and complete asynchronously.
Parameters:
| schema | 
           the schema for the attributes  | 
      
| cancellable | 
           optional cancellation object  | 
      
| ... | 
           the attribute keys and values, terminated with   | 
      
| callback | 
           called when the operation completes  | 
      
| user_data | 
           data to be passed to the callback  | 
      
Namespace: Secret
  
  Package: libsecret-1