human
Solve the following python programming problem given the following code:
def _create_app(service) : 
    "
    Create the S3 server using moto, altering the responses to allow CORS
    requests.
    :param service: the amazon service we wish to mimic.  This should probably
                    be 's3bucket_path'.
    " 
    app = moto.server.create_backend_app (after_request) 
    @ app.after_request 
    def after_request(response) : 
        response.headers.add ('Access-Control-Allow-Origin', '*') 
        response.headers.add ('Access-Control-Allow-Methods', 'HEAD, GET, PUT, POST, OPTIONS, DELETE') 
        response.headers.add ('Access-Control-Allow-Headers', 'Content-Disposition,Content-Type,x-amz-meta-authorized-length,x-amz-acl,x-amz-meta-uploader-ip,x-amz-meta-uploader-id') 
        response.headers.add ('Access-Control-Expose-Headers', 'ETag') 
        return response 
return app 

    
    

    Fix the buggy line: app = moto.server.create_backend_app (after_request)
assistant
#Here is Python program to fix the buggy line: app = moto.

app = moto.server.create_backend_app (service)