Cannot get data from a js array with Node js

I have a js object array like this.

[  
   {  
      name:"Japanilainen ravintola Koto",
      rating:3.9,
      photo:[  
         {  
            height:2160,
            html_attributions:[  
               "<a href="               https://maps.google.com/maps/contrib/110335983983267481647/photos">Hannes Junnila</a>"
            ],
            photo_reference:"CoQBdwAAAMDlivT0nOnYg8jC1txZ3RbfBR59XvKN0WphDbRVUXaUTQclzzaIaXJ8-p7s3x_aG67AUsM_HLNML6pzGl3v_wV2D-eudH_3wy2cB1ROrRgGcGyf4lRuNpE3WwXYbYZu6EK8oEPiJ5B17Lybj-eVbYM2EgVVBgOrUJhsblY1mfxWEhAZ4oHCFakH-hgkbksfGa2uGhQe4aUeOrS2isAir01KUwQ7N3Ce2Q",
            width:2269
         }
      ]
   },
   {  
      name:"Kin Sushi Helsinki",
      rating:4.2,
      photo:[  
         {  
            height:2988,
            html_attributions:[  
               "<a href="               https://maps.google.com/maps/contrib/103078599092779880596/photos">Stephan Winter</a>"
            ],
            photo_reference:"CoQBdwAAAN4iMumSbQjtRnJIH1AKRdbSfnI02WGh11r1xaVnZl1ohebKp6zpAS4mmJFqTagrIqUJ39kzulVI0sz2UzzfaVdsAFc5f80PnOCzSLqL5gnpsqv90dVJIqUWD3Bcc9TgYPPs3oGwyekkOsmjQ59o9yqdoF5GzrpaKkojhMNLxpfzEhBKpRkA2CzINpUzAAe3e90TGhQ_KbYCmtJYLfVGIu1kZkzQIAwE4A",
            width:5312
         }
      ]
   }
]

I get this array above by doing this for each.

response.results.forEach((entry)=>{
         var restaurantName = {
          "name" : entry.name,
          "rating" : entry.rating,
          "photo_reference" : entry.photos
        }
        arr.push(restaurantName);
      });
        res.send(arr);

And I send the array to my browser so I can see it. What I am trying to do is to get photo_refeerence from the entry.photos I tried entry.photos[0].photo_reference and many more ways and in all of them I am getting a cannot read properly, and now I am not sure how to get that information out.

via Masnad Nehith