1. Create an environment variable and copy the environment variable key name
  2. Utilize the process environment variable process.env.<KEYNAME>, as shown below
In the code sample, S3_BUCKET, S3_REGION, S3_ACCESS_KEY_ID, and S3_SECRET_ACCESS_KEY are all environment variables. 
import { uploadFileToS3 } from "@intuned/sdk/files";

export async function uploadFile(file: Parameters<typeof uploadFileToS3>[0], fileName?: string) {
    return await uploadFileToS3(file, {
        fileNameOverride: fileName, s3Configs: {
            bucket: process.env.S3_BUCKET,
            region: process.env.S3_REGION,
            accessKeyId: process.env.S3_ACCESS_KEY_ID,
            secretAccessKey: process.env.S3_SECRET_ACCESS_KEY,
        }
    });
}