SolvedMy first 5 champs

Is there any way to know what is "My first five champs" because i need it for some security thing and I realy cant remember that smart question.

This information is not available, generally. Your profile only keeps track of who you've unlocked (a binary, "is available / is not available") without any additional information regarding when.
That said, if you've only purchased very few champions, it may be possible to check your history in the Riot Store... but given the nature of the question, I expect that your first 5 champions will have long been pushed off the history.