No. In most systems a password is required too. This system is used to protect your account against unauthorized access.
You have only one account mapped to this username
No, you cannot log into a bank account using only the routing and account number. Additional security measures such as a username, password, and possibly other authentication methods are typically required to access a bank account online.
It is possible to merge your Answers.com account (your username) with a second social account - either Facebook, Twitter, Google, Yahoo! or LinkedIn. However, at this time, only one extra account can be merged. So for now you have to choose whether to link your Answers.com account to Google or Facebook.
Sorry, the only way to change username is to make new account. Maybe that feature will be added, who knows?
You can't recover an account if you know only the password. If you know the account name but not the password, the account may be recovered in some cases. This is the same in RuneScape, or anywhere else. The main identification of any such account is the username. The password is only for verification (to avoid other people accesing your account - your game in the case of RuneScape, your e-mail for an e-mail account, etc.). Several people may have the same password, only the username is unique.
If you are asking for a username and password of another person's account, here is not the place to do so. Not only can their account be subject to a password change, but they may lose their account. I recommend buying Minecraft, if you find it a good game!
you can reinstall the window and it will only ask the username
There is only an official Heffron Drive Twitter account - @heffrondrive
As long as the password and username are correct, you can access their account. Some of the time, other sites will only accept one internet source for their account to be accessed by (ex. facebook). But in this case, you can.
You can only change your username only once without email. You have to go to your account settings and you should find your change username button. If you would like to change your username the 2nd time, contact NK Support.
There wouldn't be a website where you could access an account without the password.
If you can't find yourself on Instagram, it may be due to privacy settings that restrict your account visibility, or you might be using a different username or account. Additionally, if your account is set to private, only approved followers can see your profile. Lastly, ensure that your account is active and not deactivated or deleted.