Where can I define header information in current version of php client lib

Hi, 

I watch some videos from google developer about sandbox account. the auth.ini files that they are using is completely different from the current version. 

here is the content of the file I have.

; Detailed descriptions of these properties can be found at:

; https://developers.google.com/adwords/api/docs/headers

developerToken = "INSERT_DEVELOPER_TOKEN_HERE"

userAgent = "INSERT_COMPANY_NAME_HERE"

; Uncomment clientCustomerId to make requests against a single AdWords account,

; such as when you run the examples.

; If you don't set it here, you can set the client customer ID dynamically:

;  $user = new AdWordsUser();

;  $user->SetClientCustomerId(...);

; clientCustomerId = "INSERT_CLIENT_CUSTOMER_ID_HERE"

[OAUTH2]

; If you do not have a client ID or secret, please create one of type

; "installed application" in the Google API console:

; https://cloud.google.com/console

client_id = "INSERT_OAUTH2_CLIENT_ID_HERE"

client_secret = "INSERT_OAUTH2_CLIENT_SECRET_HERE"

; If you already have a refresh token, enter it below. Otherwise run

; GetRefreshToken.php.

refresh_token = "INSERT_OAUTH2_REFRESH_TOKEN_HERE"

; Optionally, uncomment the oAuth2AdditionalScopes line to provide additional

; OAuth2 scopes. The AdWords API OAuth2 scope is always included. For

; additional OAuth2 scopes, reference the OAuth 2.0 Playground

; (https://developers.google.com/oauthplayground/). In the playground, each

; application has a list of OAuth2 scopes. For example, you would enter

; https://www.googleapis.com/auth/analytics here as a value if you would like

; to include Google Analytics as an additional scope.

; oAuth2AdditionalScopes = "INSERT_COMMA_SEPARATED_LIST_OF_SCOPES_HERE"

my question is here:

 where can I define email, password and some extra info.

please guide me a little.

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