app/Http/Controllers/Settings/TeamController.php
public function leaveTeam(Request $request, $teamId)
    {
        $user = $request->user();

        $team = $user->teams()
                    ->where('owner_id', '!=', $user->id)
                    ->where('id', $teamId)->firstOrFail();

        $team->removeUserById($user->id);

        return $this->teams->getAllTeamsForUser($user);
    }
public function leaveTeam(Request $request, $teamId)
    {
        $user = $request->user();

        $team = $user->teams()
                    ->where('owner_id', '!=', $user->id)
                    ->where('id', $teamId)->firstOrFail();

        $team->removeUserById($user->id);

        return $this->teams->getAllTeamsForUser($user);
    }
Remove the user from the given team.

@param  \Illuminate\Http\Request  $request
@param  string  $teamId
@return \Illuminate\Http\Response