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apply_filters( 'signup_user_init', array $signup_user_defaults )

Filters the default user variables used on the user sign-up form.

$signup_user_defaults

(array) An array of default user variables.

'user_name'
(string) The user username.
'user_email'
(string) The user email address.
'errors'
(WP_Error) A WP_Error object with possible errors relevant to the sign-up user.

Used By	Description
wp-signup.php: signup_user()	Setup the new user signup process

Version	Description
3.0.0	Introduced.

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