Intersection of two std unordered map

Question

I have two std::unordered_map

std::unordered_map<int, int> mp1;
std::unordered_map<int, int> mp2;

I need to find the intersection of key-value pairs and save it in another map of the same type.

std::unordered_map<int, int> mp;

How can i do this??