CRM customer login from zoho crm to our portal and get global api key which get use in widget invoking

CRM customer login from zoho crm to our portal and get global api key which get use in widget invoking

Hello Team we have created widgets for zoho crm extension. which are simple forms that send data to our server for further process, now what we wanted do is, CRM customer login/singup from zoho crm to our portal and get global API_KEY which get store somewhere on zoho crm. and when customer press custom button, widget get pop up and customer fill details, then data pass along with the stored api-key to our server for further process. Is this possible? or there is any other way? I hope am able to explain.