How to add multiple facebook callback urls

Question

I have a product (eg: somedomain.com) where people can create their own subdomains (eg http://xyz.somedomain.com) or even map their domains to it (eg: example.com)

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Answer 1

Hi @Phantom007 how can add support for custom domains as well like example.com, my.com and many more with sub domain of somedomain.com