corrections done

scripts/core/handlers/api_function.py

@@ -38,6 +38,7 @@ class OperationsOnApi:
             values = list(self.collection_name.aggregate(self.data_to_exel))
             dataframe = pd.DataFrame(values)
             dataframe.to_excel(Endpoints().folder + Endpoints().exel_file)
+            # download file
             return f'data inserted to path {Endpoints().folder}{Endpoints().exel_file}'
         except Exception as e:
             return "exel conversion failed", e

scripts/service/ApiCalls.py

-from fastapi import APIRouter, UploadFile
+from fastapi import APIRouter, UploadFile, Response
 from scripts.core.handlers.api_function import OperationsOnApi
 from scripts.constants.const import Endpoints
 
@@ -31,4 +31,5 @@ async def get_no_violation():
 @files.get(Endpoints().get_to_exel, tags=['Aggregation'])
 async def convert_exel():
     print(OperationsOnApi().create_exel_file())
-    return "exel file created"
+    return Response(content=open(Endpoints().folder + Endpoints().exel_file, "rb").read(),
+                    media_type="application/msexcel")