i need help with posting pictures in my signature

ohhh you thought that i i ment that idk how to post a picture. i know how to already! It just wont let me post pictures in my siggy. every time i try to post a picture it makes me sign in to this one website. i don't have an account so i click the link, and it never lets me sign up. the weird thing is, it used to let me do it. i try the other way to post a picture, but when i do, it never shows up in my signature. anything i can do about this?? i also feel really bad because i orderd in shops before this happn'd and i can not give credit.