set parameter beforeFirstLogin... to true in user class constructor

src/Entity/User.php

@@ -233,6 +233,7 @@ class User extends BaseUser
         $this->possiblegroups = new ArrayCollection();
         $this->alertemailflux = true;
         $this->canValidateAchat = false;
+        $this->beforeFirstLoginWithPrestaEnabled = true;
         $this->createApiKey();
         $this->createEmailToken();
     }