public async Task <string> GetPhotoAsBase64(string contentId)
{
var file = await _mgrFcc.GetFileContent(contentId);
if (file?.BinaryContent == null)
{
return(string.Empty);
}
string img64 = Convert.ToBase64String(file.BinaryContent);
string img64Url = string.Format("data:image/" + file.FileType + ";base64,{0}", img64);
return(img64Url);
}