# Sunrise or Sunset Images You need to create an Unsplash developer account with API key ([link](https://unsplash.com/developers)). To authenticate calls to the Unsplash API, you need to create a file called `environment_variables.py` to store your access and secret key: ```py # environment_variables.py UNSPLASH_ACCESS_KEY = "access_key" UNSPLASH_SECRET_KEY="secret_key" ```