You need to use the account you first made, 

 I forgot my password 

 https://media2.giphy.com/media/pWdckHaBKYGZHKbxs6/200w.gif?cid=586b07f0p53lzqb754qc8cg24v57njanvozyu9zly7wtu761&ep=v1_gifs_search&rid=200w.gif&ct=g