feat(POST): add POST function to insert new data on the DB

main.py

@@ -70,9 +70,9 @@ async def read_item(test_id: int):
     return {"test_string": result}
 
 
-@app.put("/test/add")
-async def add_item(test_string: str):
-    if test_string != "":
+@app.post("/test/add")
+async def add_item(test_string: Union[str, None] = None):
+    if test_string:
         with engine.connect() as conn:
             trans = conn.begin()
             insert = test.insert().values(testString=test_string)
@@ -81,9 +81,11 @@ async def add_item(test_string: str):
             rows = conn.execute(select(test))
         for row in rows:
             print(row)
+        msg = {"message": "Item added"}
     else:
         raise HTTPException(status_code=404, detail="Item not found")
-    return None
+        msg = {"message": "err"}
+    return msg
 
 
 with engine.connect() as conn: