$result = $AwsSchedulerClient->createSchedule([
            'ClientToken' => 'test_1',
            'Description' => 'test scheduler',
            'FlexibleTimeWindow' => [ 
                'Mode' => 'OFF',
            ],
            'Name' => 'test_scheduler', 
            'ScheduleExpression' => 'at(2023-04-05T08:00:00)', 
            'State' => 'ENABLED',
            'Target' => [ 
                'Arn' => 'Arn name copied from aws console for api destination',
                'RoleArn' => 'role arn copied from aws console',
            ],
        ]);