silver crawlies in my bag of compost

Hi there. Wondering if anyone can assist. Opened my bag of compost and manure to find loads of silver bugs crawling around in it. Can not tell if they have wings or not. They have both been out in the rain so i am wondering if they mosquitoes. I am worried now as i have used around plants and to repot. Anyone have any idea what these are and if they will affect my plants?