问错误:代码：[CredentialsError]配置中缺少凭据，如果使用AWS_CONFIG_FILE，则设置AWS_SDK_LOAD_CONFIG=1

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const aws = require('aws-sdk');
const multer = require('multer');
const multerS3 = require('multer-s3');
const dotenv = require('dotenv');
dotenv.config();

const s3 = new aws.S3({});
aws.config.update({
    secretAccesKey: process.env.S3_ACCES_KEY,
    accessKeyId: process.env.S3_ACCES_KEY_SECRET,
    region: "eu-west-3",
});

const fileFilter = (req, file, cb)=>{
    if(file.mimetype === "image/jpeg" || file.mimetype === "image/png"){
        cb(null, true);
    }else{
        cb(new Error("Invalid file type, file must be JPG or PNG."), false);
    }
}
const upload = multer({
    fileFilter,
    storage: multerS3({
        acl: "public-read",
        s3: s3,
        bucket: "projectoene",
        acl: 'public-read',
        metadata: function(req,file, cb){
            cb(null, {fieldName: "Test"});
        },
        key: function(req,file,cb){
            cb(null, Date.now().toString());
        },
    }),
});
module.exports = upload;