My name includes space - How do I enter my username when typing command?
Solution 1:
If you surround your name in quotes, the game will read it literally. That means that spaces, brackets, etc will be interpreted as their real characters rather than part of the syntax of the command.
For instance:
/op "sun solar arrow"
/tp "angussidney" ~ ~10 ~
Solution 2:
From the server console you can do: op @p[name="solar arrow"].