is it possible get db client in post handler?

[swaitw]

I have some code as below:

// shchema

   let schema = Schema::build(Query::default(), Mutation::default(), EmptySubscription)
        .data(db)
        .data(jwt_key) 
        .finish();

// handler

pub async fn graphql_handler(
    schema: Extension<Schema<Query, Mutation, EmptySubscription>>,
    req: GraphQLRequest,
    headers: HeaderMap,
    db: Extension<Arc<PrismaClient>>, // from handler Extention 
    jwt_key: Extension<Arc<HS256Key>>, // from handler Extention 
) -> GraphQLResponse {
   
    let mut req = req.into_inner();
    let operation_name = req.operation_name.clone();
    match operation_name.as_deref() {
        Some("login") | Some("register") => {
           req = get_token_and_user_from_headers(&headers,&db,req).await; 
        } 
        _ => {}
    }

// try to attached db and jwt_key to context, but not work for me, i cant find by their type.
    req = req.data(db).data(jwt_key);
    schema.execute(req).await.into()
}

i want check the token and insert current user into context if the operation is one of "login" and “register”, in that way i will need get the db-client in graphql handler to run get current user query. but i dont knwo how can i get the db-client which attached when build the shchem.

i also tried to attached the db-client to an Extension and attachd it to graphql Request in the handler . but it not work for me, i cant get them back from context by the client type, may be i did not use the right type.

so I have to attach the db-client to an handler Extention and also push it into the shchema when build it. in that way i can use the db-client from extention to check the token user and use the db-clinet from context in resover.

just wondering is there anyway we can get the db-client pushed in schema in the handler or we can push db-client from extention to graphql-request in hander. thanks.