RemoveBindingByHandle: where can I find the Handle parameter?

BindAction has this signature:

template<class UserClass>
FEnhancedInputActionEventBinding & BindAction
(
    const UInputAction * Action,
    ETriggerEvent TriggerEvent,
    UserClass * Object,
    typename FEnhancedInputActionHandlerSignature::TUObjectMethodDelegate< UserClass >::FMethodPtr Func
) 

FEnhancedInputActionEventBinding is:

struct FEnhancedInputActionEventBinding : public FInputBindingHandle

And FInputBindingHandle has the following method:

uint32 GetHandle() const

What do you mean with “BindAction does return the handle you need”?

And also, what do I have to store it instead of discarding?

Thanks!