How to move users from one team to another.
Moving Users to Another Team
From your Project's dashboard, select the user's current team from the left-hand column under Teams.
Next, hover over the user's name and then click on the arrow to the far right and select Change Team from the drop-down.
On the pop-up, click Add to Team and select the team you want to move the user to. When finished, click Save to move the user.
To learn more about Managing Teams and their Users, click here.