Depending on what  site it is, for password reset and possibly username forgetting,you can click forgot password or username,it may ask you if you want a code sent by email to  you or it may ask if you want an automated call or sms (text message sent to your cell phone) of a code, it will then take you to a page where you are to enter that code into the box then you should be able to reset your password after you enter that code and click enter or submit, something  under the box to tell it you'r done. I hope this is helpful.

Sincerely, Anthony Volkman