The URL is https://app.hubspot.com/oauth/23491073/authorize?client_id=1538b809-d56e-4c30-8b4f-57664475b1d4&redirect_uri=https%3A%2F%2Foauth.crewai.com%2Foauth%2Fadd&response_type=code&scope=crm.objects.contacts.write+crm.objects.contacts.read+crm.objects.deals.write+crm.objects.deals.read+crm.objects.companies.write+crm.objects.companies.read&state=[…]&code_challenge=[…]&code_challenge_method=S256
Based on the URL, CrewAI needs to add the redirect_uri to the allowed redirects in their app on HubSpot.