parsing profile photo from ms graph on nodejs

Question

I'm trying to parse the logged in user's photo on node.js using graph API and something is not correct about the generated base64, I've tried different combinations and the photo is always corrupt.

export async function getPhotofromMsGraph(
accessToken: string,
): Promise<string | undefined> {
const config = {
headers: {
  Authorization: `Bearer ${accessToken}`,
  ResponseType: 'arraybuffer',
  },
};

  return axios
    .get(graphConfig.graphPhotoEndpoint, config)
  .then((response) => {
  const { data } = response;
  if (data) {
    var imageType = 'image/jpeg';
    var imageBytes = Buffer.from(data).toString('base64');
    var imageSrc = `data:${imageType};base64,${imageBytes}`;
    return imageSrc;
  }
  return undefined;
})
.catch((error) => {
  throw error;
});
}