Below code snippet will help you to create new user as a admin if you forgot admin credentials on your WordPress website. Insert below code in functions.php file in your active theme.
<?php function wpb_admin_account(){ $user = 'johndoe'; $pass = 'Password'; $email = 'email@domain.com'; if ( !username_exists( $user ) && !email_exists( $email ) ) { $user_id = wp_create_user( $user, $pass, $email ); $user = new WP_User( $user_id ); $user->set_role( 'administrator' ); } } add_action('init','wpb_admin_account'); ?>