def get_presigned_url():
    s3 = boto3.client('s3')
    bucket = "your-s3-bucket-name"

    return s3.generate_presigned_post(
        Bucket=bucket,
        Key="media/screenshots/login.png",
        Fields={"acl": "public-read", "Content-Type": "png"},
        Conditions=[
            {"acl": "public-read"},
            {"Content-Type": "png"}
        ],
        ExpiresIn=3600
    )