Logging by Username or Email when using two entities with FOSUserBundle - symfony

Question

I am using FOSUSerBundle with two different Entities for different Users like
DefaultUser and AdminUser
Therefore I have the following in security.yaml
providers:
user:
entity:
class: AppBundle:User
property: 'email'
admin:
entity:
class: AppBundle:Admin
property: 'email'
and firewall is set like this:
admin:
pattern: ^/admin
anonymous: ~
provider: admin
form_login:
login_path: /admin/login
csrf_token_generator: security.csrf.token_manager
default_target_path: /admin
check_path: admin_login_check
logout_on_user_change: true
logout:
path: /admin/logout
target: /admin
invalidate_session: false
access_denied_handler: AppBundle\Security\AccessDeniedHandler
context: application
main:
pattern: ^/
provider: user
logout_on_user_change: true
form_login:
# csrf_token_generatlor: security.csrf.token_manager
login_path: /login
default_target_path: /user
check_path: fos_user_security_check
logout:
path: user_logout
target: user_login
invalidate_session: false
context: application
anonymous: ~
access_denied_handler: AppBundle\Security\AccessDeniedHandler
How to get FOSUserBundle work, so I can use username or Email ?
Normally it is set by
id: fos_user.user_provider.username_email
but this cannot used in this configuration.

Answer 1

It's been a long time since I worked with the fos_userbundle, but from what I see in my code, you'll need to update your security.yml file to make use of it:
security:
providers:
fos_userbundle_admin: appbundle.service.providing.admin_user
And in that service (which extends FOS\UserBundle\Security\UserProvider), you'll want to override the findUser($username) method. There, you can use the provided username.
I suppose (untested) you can create another provider (fos_userbundle_user) and use that one for users in your firewall.
Hopefully this makes sense.. It's working here, but that was in a symfony 2.8 app. FOS_UserBundle has changed a fair bit since then.