GCStoGCSOperator Move option across projects Composer/Airflow

Question

So I'm utilizing the GCStoGCSOperator to grab a report from the reporting API then doing a few updates to the report in a Project, but then when I try to move that file to Project 2 its throwing an error stating that bucket doesn't exist.

I currently have a SA account that is attached to both GCS buckets in both Projects. But, I'm unable to do the following Operator:

move_single_file = GCSToGCSOperator(
    task_id="move_single_file",
    source_bucket=BUCKET_1_SRC,
    source_object=OBJECT_1,
    destination_bucket=BUCKET_1_DST,
    destination_object="backup_" + OBJECT_1,
    move_object=True,
)

Where BUCKET_1_SRC is Project 1 and BUCKET_1_DST is Project 2. How would I go about doing this to make it so it moves a file from Project 1 and moves it over to Project 2? I'm currently getting a 404 POST Error stating that the Bucket does not exist. Is there a destination_project variable that I may be missing in this?

Any help would be greatly appreciated!