Get PDF Response

Map<String, Object> invoiceFiltersMap = new Map<String, Object>();
invoiceFiltersMap.put('referenceId', 'e6f5564e-2d4e-4983-875e-c162a9125a7f');    
invoiceFiltersMap.put('type', 'invoice');    

//  Initializing the Request Data to be passed.
    Map<String, Object> reqObj = new Map<String, Object>();
    reqObj.put('version', '1.0');
    reqObj.put('action', 'getTransactionPDF');
    reqObj.put('queryParameters', invoiceFiltersMap);
    //Required, if Xero Multi-Org is enabled in Breadwinner. 
    reqObj.put('xeroOrgId', '!14kpg'); 

//  Placing a request to Breadwinner Global API
Map<String, Object> respMap = bread_winner.BreadwinnerXeroAPI.call(reqObj);
System.debug(respMap);

// After making the Breadwinner callout
Map<String, Object> respMap = BreadwinnerXeroAPI.call(reqObj);

if(respMap.get('apiErrors')!=null){
    system.debug(respMap.get('apiErrors'));
    //write your custom code here
    // Breadwinner errors thrown before making a request to Xero. i.e action name incorrect
}
else{ // request successfully sent to Xero
    PdfResponse res =(PdfResponse)JSON.deserialize(String.valueOf(respMap.get('responseJSON')),PdfResponse.class);
    
    if(res.statusCode!=NULL && res.statusCode==200){ // Xero returned PDF response
        Attachment att = new Attachment();
        att.Body = res.pdfResponse;
        att.ParentId = '0010p00001Au4vuAAB'; // Salesforce record Id
        att.contenttype = 'application/pdf';
        att.Name = 'Invoice-pdf-01';
        system.debug(att);
        Insert att;
    }
    else{
        system.debug(res.errors); // Xero returned errors
    }
}

public class PdfResponse{
    public Blob pdfResponse;
    public Integer statusCode;
    public String type;
    public String referenceId;
    public List<ErrorClass> errors;
}

public class ErrorClass{
    public String message;
    public String code;
}