Settings-api-fix

<?php
/*
	Plugin Name: Query APIs
	Plugin URI: https://omukiguy.com
	Description: Plugin Working with External API calls in WordPress.
	Version: 0.1.0
	Author: Laurence Bahiirwa
	Author URI: https://omukiguy.com/
	License: GPL-3.0+
	License URI: http://www.gnu.org/licenses/gpl-2.0.txt
	Text-Domain: woougsms
*/

// If this file is called firectly, abort!!!
defined( 'ABSPATH' ) or die( 'Unauthorized Access!' );

/**
 * Register a custom menu page.
 */
function woougsms_create_admin_page() {
    add_menu_page(
		'SMS Plugin Settings',
		'SMS Plugin',
        'manage_options',
        'woougsms_plugin',
        'create_menu_page',
        'dashicons-testimonial',
        85
	);
	
	//call register settings function
}
add_action( 'admin_menu', 'woougsms_create_admin_page' );

function register_woougsms_settings() {
	$defaults = array(
        'type'              => 'string',
        'sanitize_callback' => 'sanitize_text_field',
        'show_in_rest'      => false,
    );
	//Sidebar Options
	register_setting( 'sunset-settings-group', 'profile_picture', $defaults );
	add_settings_section( 'sunset-sidebar-options', 'Sidebar Option', 'sunset_sidebar_options', 'woougsms_plugin');
	add_settings_field( 'sidebar-profile-picture', 'Profile Picture', 'sunset_sidebar_profile', 'woougsms_plugin', 'sunset-sidebar-options');
	
}

// Sidebar Options Functions
function sunset_sidebar_options() {
	echo 'Customize your Sidebar Information';
}

function sunset_sidebar_profile() {
	$picture = esc_attr( get_option( 'profile_picture' ) );
	echo '<input type="text" name="last_name" value="'.$picture.'" placeholder="Last Name" />';
}


function create_menu_page() {
	?>
	<div class="wrap">
		<h1>Your Plugin Name</h1>
		<form method="post" action="options.php">
			<?php settings_fields( 'sunset-settings-group' ); ?>
			<?php do_settings_sections( 'woougsms_plugin' ); ?>
			<?php submit_button( 'Save Changes', 'primary', 'btnSubmit' ); ?>
		</form>
	</div>
	<?php
}

add_action( 'admin_init', 'register_woougsms_settings' );

function external_api_call() {

	$url = 'https://jsonplaceholder.typicode.com/users';
	$arguments = array ( 
		'method' => 'GET' 
	);
	
	$response = wp_remote_get( $url, $arguments);

	if ( is_wp_error( $response ) ) {
		$error_message = $response->get_error_message();
		echo "Something went wrong: $error_message";
	}

	echo '<pre>';
	var_dump(wp_remote_retrieve_body($response));
	echo '</pre>';

}