awsS3.js

var AWS = require("aws-sdk");
var credentials = {
  accessKeyId: process.env.AWS_ACCESS_KEY,
  secretAccessKey: process.env.AWS_SECRET_KEY
};
AWS.config.update({
  credentials: credentials,
  region: process.env.AWS_S3_REGION
});

module.exports = new AWS.S3({ signatureVersion: "v4" });

generateUrl.js

    const S3 = require("@src/utils/awsS3");
    
    const presigneUrl = S3.getSignedUrl("putObject", {
      Bucket: "fireblog.dev",
      Key: filename
      //Expires: parseInt(process.env.AWS_S3_PRESIGNED_URL_UPLOAD_EXPIRES_SECONDS)
    });

    console.log("presignedUrl", presigneUrl);