Merge branch '148-push-id-api' into 'master'

Resolve "Push id API"

Closes #148

See merge request jankstudio/resq!145

src/Entity/MobileSession.php

@@ -38,13 +38,13 @@ class MobileSession
 
     // device id or push id used by device
     /**
-     * @ORM\Column(type="string", length=200)
+     * @ORM\Column(type="string", length=200, nullable=true)
      */
     protected $device_push_id;
 
     // phone id
     /**
-     * @ORM\Column(type="string", length=50)
+     * @ORM\Column(type="string", length=50, nullable=true)
      */
     protected $phone_id;