username_exists

apply_filters('username_exists') is found 1 times:

• /wp-includes/user.php line 2000

  	 * @param int|false $user_id  The user ID associated with the username,
  	 *                            or false if the username does not exist.
  	 * @param string    $username The username to check for existence.
  	 */
  	return apply_filters( 'username_exists', $user_id, $username );
  }
  
  /**
   * Determines whether the given email exists.
   *
   * For more information on this and similar theme functions, check out
  

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