Set value to referenced field programmatically

Hi !

I'm trying to create user who has more than 1 team. And the field "team" is referenced to a content "team".

My code works execpt for the field_team, who is the referenced field. So... I d'ont know how to do it :

		$user = User::create();
		$user->setPassword("");
		$user->enforceIsNew();
		$user->setEmail($row['mail']);
		$user->setUsername(($row['login'])); 
		$user->addRole($role);
		if(!empty($row['adress']))
			{$user->field_adresse = $row['adress'];}
		if(!empty($row['name']))
			{$user->field_nom = $row['name'];}
		if(!empty($row['firstname']))
			{$user->field_prenom = $row['firstname'];}
		if(!empty($row['phone1']))
			{$user->field_telephone = $row['phone1'];}
		if(!empty($row['staff_corps']))
			{$user->field_statut = $row['staff_corps'];}
		if(!empty($equipesdumembre))
			{$user->field_team = $team;}
		$user->status = 1;
		$user->save();

$team is an array of team's like [0]->team1 [1]->team5 ... And the user has to get those teams