Scope validation with FOSOAuthServerBundle

Question

I'm using FOSOAuthServerBundle with Symfony 2.7.

I would like to use scopes to differenciate two types of clients :

• scope_default : the client can only access the authenticated user information
• scope_master : the client can read everything

I added the property reachable_scopes in my Client Entity.

How can I make sure a client won't ask for the scope_master if he isn't allowed to ?

Thank you !