To make sure all your players are linked properly to Sonar, you can’t actually create players in Quboo.
First, you have to connect the Sonar plugin. Then, your Sonar users will be synchronized with Quboo after you run the next Sonar analysis.
Once you load players from Sonarqube, their aliases are loaded as well. You can customize this field for each player by hovering your mouse over the player alias and clicking the pencil. After editing it, just click outside the area or press Enter.