Missing a receive token call in the generated client

Hello,

I have the following part for securityDefinition in my swagger 2.0 API definition:

securityDefinitions:
  petstore_auth:
    type: "oauth2"
    tokenUrl: "http://petstore.swagger.io/oauth/dialog"
    flow: "password"
    scopes:
      write:pets: "modify pets in your account"
      read:pets: "read your pets"

With this API definition I generate a C# API Client with the online Swagger Editor Tool. The generated client code does not include an API call to receive the token from the given Url "http://petstore.swagger.io/oauth/dialog". 

What am I missing here?

Thanks in advance,

David