Upsert participants fix to allow empty external-org-name (#995)

* Making external-org-name optional.

* external-org-name set to None.

* external-org-name set to ''.

scripts/upsert_participants.py

@@ -104,20 +104,24 @@ def read_files_from_gcs(bucket_name: str, file_path: str):
 @click.option('--participant-meta', help='Path to participant metadata CSV.')
 @click.option('--sample-meta', help='Path to sample metadata CSV.')
 @click.option('--sample-external-id-column', help='Column name for sample external ID.')
-@click.option('--external-org-name', help='External organization name.')
+@click.option('--external-org-name', required=False, help='External organization name.')
 def main(
     bucket: str,
     participant_meta: str,
     sample_meta: str,
     sample_external_id_column: str,
-    external_org_name: str,
+    external_org_name: str | None = None,
 ):  # pylint: disable=too-many-locals
     """Upsert participants to metamist"""
     # Query metamist
     project = bucket.split('-')[1]  # project name derived from bucket name
     data_response = get_sample_data(project)
     project_id = data_response.get('project')['id']
 
+    # allow empty external_org_name for backwards compatibility
+    if external_org_name is None:
+        external_org_name = ''
+
     sample_eid_mapping = map_sample_eid_to_sample_data(data_response)
 
     # Set up logging