Is there a way my rasa chatbot can know the logged in user full name and greet him?

I’m currently working on Rasa to develop a chatbot to my e-commerce website. I want to know how do i greet the user with his/her own name. For instance, the user will login to the application and then when he clicks on the chatbot icon it should know who logged in and greet the user. Is there a way i can achieve this.? Its through session data i suppose. how do i do that?