multer s3 access denied using multer -s3 amazon server image upload error access denied

static awsStorage: multer.StorageEngine = multerS3({

		s3: new aws.S3({

			credentials: new aws.Credentials({

				accessKeyId: process.env.AWS_ACCESS_KEY_ID,

				secretAccessKey: process.env.AWS_ACCESS_KEY

			}),

			hostPrefixEnabled: true,

			computeChecksums: true,

			s3BucketEndpoint: true,

			correctClockSkew: true

		}),

		bucket: process.env.AWS_BUCKET_NAME,

		contentType: multerS3.AUTO_CONTENT_TYPE,

		serverSideEncryption: ‘AES256’,

		[Multer.acl as any]: ‘public-read’,

		metadata(_req: Request, file: Express.Multer.File, done: any) {

			if (!file) done(new Error(‘Get file upload failed’), null)

			done(null, file)

		},

		key(_req: Request, file: Express.Multer.File, done: any) {

			done(null, `${Date.now()}.${file.originalname.split(‘.’)[1]}`)

		}

	})// or use my trick like this

let acl = ‘ACL’

// like this not my trick

var upload = multer({

    storage: multerS3({

        s3: s3,

        ACL: ‘public-read’,

        bucket: BucketName,

        key: function (req, file, cb) {

            cb(null, new Date().toISOString() + ‘-‘ + file.originalname);

        }

    })

});
// like this with my trick for by error in ts

var upload = multer({

    storage: multerS3({

        s3: s3,

        [acl]: ‘public-read’,

        bucket: BucketName,

        key: function (req, file, cb) {

            cb(null, new Date().toISOString() + ‘-‘ + file.originalname);

        }

    })

});