I am working on developing custom salesforce app (Survey app) in salesforce, things so far i have done are.
Add Survey Questions
Making the survey Link Public.
Survey Result etc.
Public Survey Link is here:
Now i need to know that how can i Create a custom Login and Custom registration for an external user(Could be anyone), so, before taking the survey, users could login or Register themselves into salesforce. I need the way to Login or register.