iOS How to access historical M7 data?

    NSOperationQueue *stepQueue = [[NSOperationQueue alloc] init]; //Init setpQueue
    stepQueue.maxConcurrentOperationCount = 1;

    CMStepCounter *myStepCounter = [[CMStepCounter alloc] init]; //Init stepcounter

    NSDate *tillDateTime = [NSDate date]; //init date till ( NOW )
 
    NSCalendar *calendar = [NSCalendar autoupdatingCurrentCalendar];
    NSDateComponents *components = [calendar
            components:NSYearCalendarUnit
            | NSMonthCalendarUnit
            | NSDayCalendarUnit
            fromDate:tillDateTime];

   NSDate *fromDateTime = [calendar dateFromComponents:components]; //init date from

    //Get the steps between the 2 dates
    [myStepCounter stepCounter queryStepCountStartingFrom:fromDateTime
            to:tillDateTime
            toQueue:stepQueue
            withHandler:^(NSInteger stepAmount, NSError *error) {
                if (error)
                    //105 == not authorized
                    NSLog(@"%@", [error localizedDescription]);
                else
                    NSLog(@"Steps between datetimes : %i", stepAmount);
            }
    ];