public void addUser(String username) throws DuplicateNameException, IOException {
		addUser(username, (char[]) null);
	}
Add a user.
@param username user name/SID
@throws DuplicateNameException if username already exists
@throws IOException if IO error occurs
Ghidra/Features/GhidraServer/src/main/java/ghidra/server/UserManager.java