How to add Authentication header to Dash-plotly app with flask backend when using Kong with oauth2?

I have a Dash app backed with a flask backend and I am using the Kong oauth2 plugin to handle authentication for my app. I want to add the authentication access_token header

Authorization: Bearer hgvcvbjjiugyfgdcvbnkjihyugyfgfhugyfcgvbnj

whenever I call the /Dash route.

How can I add this header to my app.