I’m planning to build a peer to peer marketplace website where the users themselves will be the buyers and sellers, I want each user to have his/her own Bitcoin wallet to enable each of them to send, receive and view their individual Bitcoin wallet balance on the website.

However, I don’t want to use a bitcoin wallet service which I would build from scratch myself or hire a developer to do it for me, instead, I would prefer if I’m able to integrate an existing reputable Bitcoin wallet service provider (e.g. BitGo, Blockchain, Coinbase e.t.c) in my website.

If the integration is possible, I would not have to worry much about securing the users Bitcoin wallets on the site against hackers, making sure the users' wallets are secured would be the problem of the Bitcoin wallet service provider I'm using. I, the website owner/admin, don't want to have access to the users' wallet without their permission, I believe this integration will enable me to achieve that as well.

I  welcome replies that answer this question or ideas that are better than what I'm asking. Thanks