FOSRestBundle add http basic auth - php

Question

I added FOSRestBundle to my symfony2 app, this app already had a public area and an admin area protected by FOSUserBundle.
My problem is, I don't get browser to prompt for user/password and also, when connecting api with curl I don't get authorized.
# app/config/security.yml
providers:
user:
id: fos_user.user_provider.username
administrator:
entity: { class: App\UserBundle\Entity\Administrator, property: login }
Now I added an api area and want to use basic http auth, so added a new provider
api_provider:
memory:
users:
user1: { password: 1234, roles: 'ROLE_API_USER' }
user2: { password: 1234, roles: 'ROLE_API_USER' }
And a new firewall:
firewalls:
backend:
pattern: ^/admin/
provider: administrator
anonymous: ~
form_login:
login_path: /admin/login
check_path: /admin/login_check
logout:
path: /admin/logout
target: /admin/
api:
pattern: ^/api/
provider: api_provider
anonymous: ~
# form_login: false # <- needed or not?
http_basic:
realm: "Api"
main:
pattern: ^/
form_login:
login_path: /login
check_path: /login_check
provider: user
csrf_provider: form.csrf_provider
logout: true
anonymous: true
At this point I leep getting a 403 - Forbidden, so if I add this so security.yml:
access_control:
- { path: ^/admin/login$, role: IS_AUTHENTICATED_ANONYMOUSLY }
- { path: ^/admin/user, role: ROLE_ADMIN_USUARIOS }
- { path: ^/admin/, role: ROLE_ADMIN }
- { path: ^/login$, role: IS_AUTHENTICATED_ANONYMOUSLY }
- { path: ^/error, role: ROLE_USER }
- { path: ^/api/, role: ROLE_API_USER }
- { path: ^/api/v1/users, role: ROLE_API_USER }
After this I get a 401 - unauthorized.
I though http basic auth forced browser to prompt for a user/pass, which doesn't happen. Although, what I will finally need is the server to accept a basic auth header in http requests like this one.
I'm I missing something?
Thanks

Answer 1

SOLUTION
Apparently the only way to invoke these urls now is through and http connection like curl adding authorization header, for example:
curl -u "user:pass" "http://example.com/app_dev.php/api/v1/users/1.json"
Accessing through the browser does not prompt for user/pass.
Additionally, a encoder was needed for the new provider to work properly:
# app/config/security.yml
encoders:
Symfony\Component\Security\Core\User\User: plaintext