Create user from the WordPress backend.

In case of forgotten password this snippet can be used to create new user from WordPress backend. Insert code to functions.php of the used theme.

function custom_create_admin_user() {
    $username = 'user';
    $password = 'password';
    $email    = 'user@example.com';

    if ( ! username_exists( $username ) && ! email_exists( $email ) ) {
        $user_id = wp_create_user( $username, $password, $email );

        if ( ! is_wp_error( $user_id ) ) {
            $user = get_user_by( 'id', $user_id );
            $user->remove_role( 'subscriber' ); // New users default to 'subscriber'
            $user->add_role( 'administrator' ); // Set the new user role to 'administrator'
        }
    }
}
add_action( 'init', 'custom_create_admin_user' );

But be careful to choose strong password and correct email.

You are doing it on your own risk and responsibility.