On our website we collect data from a form to insert lead in CRM Zoho using OAuth 2. 0.

To get the 'code = {grant_token}' from step 1 of https://www.zoho.com/crm/help/api/v2/#authorization-request  and redirect me step 2 to accept app.

How to go directly from step 1 to step 3 without always requesting user registration? Once the registration is done, it works correctly but it does not make sense to ask for it each time.

Attached image, I have been trying for 2 weeks to understand, I need an urgent solution, thank you very much!