How to make a static template member function as friend

I would like to define a staitc member funtion to build my class. This staitc function would access private member, and I make it as friend.

Here is the demo code:

#include <memory>

template<typename T>
class Foo
{
public:
    static std::unique_ptr<Foo> Create();

    friend static std::unique_ptr<Foo> Foo::Create();
};

template<typename T>
std::unique_ptr<Foo<T>> Foo<T>::Create()
{
    return std::unique_ptr<Foo<T>>();
}

template class Foo<int>;
template class Foo<double>;


int main()
{
    return 0;
}

It compiles faild. How to fix it?