How to get a id profile Fb & Vk?

How to get a id profile Fb & Vk ?
without the app on Fb or vk
Just need the profile ID of guests to my website
Saw somewhere a week ago the method with the use of the group widget or something of the widget type he generates this about the guest if they are logged in on fb or vk do not know just where the saw
If it does not work what is methods ?
July 9th 19 at 11:28
1 answer
July 9th 19 at 11:30
VK: here
FB: no

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