deposit multi address

[pedram1995kzm]

I'm trying to generate deposit address for each account of my exchange website users by using COINEX API I've faced a real problem imagine there is 2 users in my website and USER1 wants to deposit BTC so when he clicks on generate deposit address code runs : PUT /balance/deposit/address/BTC and address displays to him. but he hasn't used this address yet suddenly USER2 wants to deposit BTC too and then code runs again: PUT /balance/deposit/address/BTC but it says { code: 318, data: { }, message: "Deposit address not used." } should USER2 wait untill USER1 completes his deposit?! it can't be like that.. any idea for solving this? how everyone make an exchange with coinex api, it doesn't make a trouble for them?

[CliffS]

Each user should have his own connection by calling const coinex = new Coinex(API_KEY, SECRET);. I'm not sure how you are dealing with multiple users but only one API_KEY and SECRET pair.
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