Method is_question_owner

ch_09/src/store.rs:60–79

(
        &self,
        question_id: i32,
        account_id: &AccountId,
    )

    }

    pub async fn is_question_owner(
        &self,
        question_id: i32,
        account_id: &AccountId,
    ) -> Result<bool, Error> {
        match sqlx::query(
            "SELECT * from questions where id = $1 and account_id = $2",
        )
        .bind(question_id)
        .bind(account_id.0)
        .fetch_optional(&self.connection)
        .await
        {
            Ok(question) => Ok(question.is_some()),
            Err(e) => {
                tracing::event!(tracing::Level::ERROR, "{:?}", e);
                Err(Error::DatabaseQueryError(e))
            }
        }
    }

    pub async fn add_question(
        self,