Based on what I understand, a good way to resolve it is by using the OAuth 2 protocol (you can find a little more information about it on http://oauth.net/2/)
When your user logs into your application they will get a token and with this token they will be able to send to other services to identify them in the request.
Example of Chained Microservice Design
Resources:
- http://presos.dsyer.com/decks/microservice-security.html
- https://github.com/intridea/oauth2
- https://spring.io/guides/tutorials/spring-security-and-angular-js/