[Route("GetMinioUploadURL")]
        [HttpGet]
        [AllowAnonymous]
        public async Task<ApiResult<string>> GetMinioUploadURL()
        {
            var result = new ApiResult<string>();
            string bucketName = "mybucket";
            string objectName = DateTime.Now.ToString("yyyyMMddHHmmsss")+".jpg";
            var client = new MinioClient(
                endpoint: "192.168.0.235:9000",
                accessKey: "minioadmin",
                secretKey: "minioadmin"
                );
            try
            {
                string presignedUrl = await client.PresignedPutObjectAsync(bucketName, objectName, 1000);
                result.Message = presignedUrl;
            }
            catch (Exception e)
            {
                result.Message = "Exception {e.Message}";
            }
            return result;
 
        }