xcode core data (database) access - search -login

- (BOOL) userLogin:(NSString *)username

                  :(NSString *)password

{

   

    

    NSFetchRequest *userFetchRequest = [NSFetchRequest fetchRequestWithEntityName:@"User"];

    userFetchRequest.predicate = [NSPredicate predicateWithFormat:@"username == %@", username];

    NSError *error;

    NSArray *users = [self.context executeFetchRequest:userFetchRequest error:&error];

    NSManagedObject *matches = nil;

    if ([users count] == 0) {

        NSLog(@"Invalid Username");

        return FALSE;

    } else {

        matches = [users objectAtIndex:0];

        NSLog([NSString stringWithFormat:@"%@",users]);

        NSLog([matches valueForKey:@"username"]);

        NSLog([matches valueForKey:@"password"]);

        NSString *mypass =[matches valueForKey:@"password"];

        if ([mypass isEqualToString:password]) {

            NSLog(@"All correct at login");

            return TRUE;

        }

        else

        {

            NSLog(@"Invalid Password");

            return FALSE;

        }

        

        

       // NSLog([NSString stringWithFormat:@"%d matches found", [objects count]];

    }