Herepy EVCharging Station API; Error occured: Forbidden, description: These credentials do not authorize access

Question

I am trying to use HERE api to get some charging station data. I signed up for a freemium account and verified my email address.

I am using Herepy to send requests but unfortunately I get the following error

HEREError: Error occured: Forbidden, description: These credentials do not authorize access

I am not sure why I am getting this error. I got my API key under the section Get your credentials ; subsection REST and generated the API key. I am using the following script to test my request

from herepy import *
import requests
api_key = "MY_API_KEY"  # Enter your key here
evAPI = EVChargingStationsApi(api_key)
response = evAPI.get_stations_circular_search(latitude = 37.87166, longitude = -122.2727, radius = 10000)

but I get the following error