    pub fn mint(
        &self,
        deps: DepsMut,
        info: MessageInfo,
        token_id: String,
        owner: String,
        token_uri: Option<String>,
        extension: T,
    ) -> Result<Response<C>, ContractError> {
        //@audit no money collected to mint a token? do they mint for free? 
        // cw_ownable::assert_owner(deps.storage, &info.sender)?;

        let longterm_rental = LongTermRental {
            islisted: None,
            price_per_month: 0u64,
            available_period:vec![],
            deposit_amount: Uint128::from(0u64),
            withdrawn_amount: Uint128::from(0u64),
            denom:"ibc/F082B65C88E4B6D5EF1DB243CDA1D331D002759E938A0F5CD3FFDC5D53B3E349".to_string(),
            auto_approve:false,
            cancellation:vec![],
            minimum_stay:0u64,
        };

        let shortterm_rental = ShortTermRental {
            islisted: None,
            price_per_day: 0u64,
            available_period: vec![],
            deposit_amount: Uint128::from(0u64),
            withdrawn_amount: Uint128::from(0u64),
            denom: "ibc/F082B65C88E4B6D5EF1DB243CDA1D331D002759E938A0F5CD3FFDC5D53B3E349".to_string(),
            auto_approve: false,
            cancellation:vec![],
            minimum_stay:0u64,
        };

        let sell = Sell {
            islisted:None,
            auto_approve:false,
            price:0u64,
            denom:"ibc/F082B65C88E4B6D5EF1DB243CDA1D331D002759E938A0F5CD3FFDC5D53B3E349".to_string(),            
        };

        // create the token
        let token = TokenInfo {
            owner: info.sender.clone(),
            approvals: vec![],
            rentals:vec![],
            bids:vec![],
            longterm_rental,
            shortterm_rental,
            sell,
            token_uri, 
            extension,
        };

        self.tokens
            .update(deps.storage, &token_id, |old| match old {
                Some(_) => Err(ContractError::Claimed {}),
                None => Ok(token),
            })?;

        self.increment_tokens(deps.storage)?;

        Ok(Response::new()
            .add_attribute("action", "mint")
            .add_attribute("minter", info.sender)
            .add_attribute("owner", owner) //@audit here owner arg is used but in the token object owner is set to info.sender. owner may not be info.sender
            .add_attribute("token_id", token_id))
    }
