How to link ember js and spring boot having spring security app

I have an ember app for frontend. I have spring boot app using spring security for providing API's. Through postman I am able to login and use the API's. When I remove the security part from Spring boot app I am able to access all the API's from ember app. Can someone guide me how to link the login part from spring security with ember js? In spring boot I have configured security part such that it validates users using email id and password taking from database mysql.