A little more detail: Our integration is only for our company, not for our users. We have a system that captures client details that we want to synchronize to HubSpot to ensure we have the same data in both systems. All of the synchronization should happen behind-the-scenes through API calls.
The gist is that we want to authorize our external app, not our individual users. So how do we get an authorization token without the redirect_uri parameter? Can we generate it with the secret on our own using OAuth libraries?