How to fetch Log (CSV Format) output through API

Hello

when i try to fetch the logs through API call, its able to provide the output in raw format. whereas when we to query the same in CSV format through API, throws a <data> message as below, how it can be fetched & stored the log stuffs

<logs>
            <data/>
            <data/>
            <data/>
            <data/>
            <data/>
            <data/>
            <data/>
            <data/>
            <data/>