I can create a keyboard shortcut.
“I use my iPad as a tool.”
Are you tired of rewriting your username? Then go to “Settings”, then go to “General”, and then “Keyboards”. Look for “Shortcuts”, and click “Add New Shortcut”. Click “Phrase” and type in your real username and in “Shortcut” do a little part of the username or something you can remember. Now, when you type that shortcut, it will be replaced with the phrase that you entered. Make sure to make your shortcut unique so that it doesn’t autocorrect you when you are typing common words.