Fix non-existent tag error (#684)

Co-authored-by: KCarretto <Kcarretto@gmail.com>

Author: hulto

bin/ccdc-team-mappings/create_tags.py

@@ -63,7 +63,10 @@ def get_tag(self, tag_name):
         if 'errors' in res:
             return -1
         else:
-            return res['data']['tags'][0]['id']
+            if len(res['data']['tags']) > 0:
+                return res['data']['tags'][0]['id']
+            else:
+                return -1
 
     def create_tag(self, tag_name: str, tag_kind: str):
         print(f"{tag_name}:{tag_kind}")