We are migrating our website to HubSpot and having trouble figuring out the best way to allow website visitors to register for our webapp from a landing page.
Today we host both website and webapp on megalytic_com. We are migrating the website to Hubspot and it will be on the megalytic_com domain. Our webapp is moving to app.megalytic_com. The app is built on the LAMP stack. We want to have a registration form on various website (HubSpot) landing pages where a visitor can register for an account on our webapp and be logged into their account from that landing page and then forwarded over to app.megalytic_com as a logged-in user who is logged-in to their new account.
For example, here is a the kind of landing page we'd like to create in HubSpot: https://landing.megalytic.com/seo-reporting. When the user completes the form, he is logged in to app.megalytic_com and starts the product onboarding process. Here's a video that that shows the screens and explains the use case: http://www.youtube.com/watch?v=sAt873P7QRs
Thanks in advance for any help.