The Authentication is done via the **x-api-key** HTTP Header. For example, if your API key is your_key_1 
from newscatcherapi import NewsCatcherApiClient

API_KEY = 'your_key_1'

newscatcherapi = NewsCatcherApiClient(x_api_key=API_KEY)

news_articles = newscatcherapi.get_search(q="Tesla")
Get your API key by registering at app.newscatcherapi.com