Laravel Unexpected Data found

Im trying to calculate time difference in minutes Via Laravel and Carbon.

When i get my collection from my query the result looks like this:

`

Collection {#407
  #items: array:1 [
    0 => ClockingSystemHours {#408
      #dates: array:3 [
        0 => "start_time"
        1 => "end_time"
        2 => "total_time"
      ]
      #original: array:8 [
        "id" => 2
        "start_time" => "16:21:29"
        "end_time" => "23:20:52"
        "total_time" => null
        "worky_id" => 2
        "employee_id" => 1
        "created_at" => "2019-01-24 16:21:29"
        "updated_at" => "2019-01-24 16:21:29"
      ]

`

As you can see in the result i've set my $dates in my Model.

But when i try to access my start_time or end_time its resulting in this:

`

Unexpected data found.
    ↵Unexpected data found.
    ↵Data missing

`

But when i try to access worky_id it results in 2.

What am i doing wrong? Or is there a reason why i cant access the data?

via Chebli Mohamed