This sample application uses okta together with flask for authentication purposes.
I am publishing this because, as of now, any examples or tutorials on the subject are either non-existent or impossible to find.
First, you must register an okta application. Through the setup to create a new application, select 'Web', and use 'Authorization Code' for the 'Grant type allowed' section. Next, set 'Base URI' to http://localhost:5000/ and 'Login redirect URI' to http://localhost:5000/authn-callback.
Then, set the CLIENT_ID, CLIENT_SECRET, and OKTA_BASE_URL environment variables to their respective values from Okta.
Example base url: https://example.okta.com