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apply_filters( 'auth_cookie', string $cookie, int $user_id, int $expiration, string $scheme, string $token )

Filters the authentication cookie.

$cookie: (string) Authentication cookie.
$user_id: (int) User ID.
$expiration: (int) The time the cookie expires as a UNIX timestamp.
$scheme: (string) Cookie scheme used. Accepts 'auth', 'secure_auth', or 'logged_in'.
$token: (string) User's session token used.

Used By	Description
wp-includes/pluggable.php: wp_generate_auth_cookie()	Generates authentication cookie contents.

Version	Description
4.0.0	The `$token` parameter was added.
2.5.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/auth_cookie