int main(int argc, const char * argv[]) {
@autoreleasepool {
    NSMutableDictionary *dictionary = nil;

 //The line below shows the error
    SiteValue* person1 = [SiteValue siteValueWithUsername: @"person1"     andPassword: @"123" andCount: 0];

}
return 0;

}

@interface SiteValue : NSObject

+(SiteValue*) siteValueWithUsername: (NSString *)username andPassword: (NSString *)password andCount: (int) count;

@end

#import "SiteValue.h"

    @implementation SiteValue

    //Defining the three varibles
NSString* username1;
NSString* password1;
int count1;

-(id)initWithUsername: (NSString *)username
          andPassword: (NSString *)password
             andCount: (int) count {
    self = [super init];
    if (self) {
        username1 = username;
        password1 = password;
        count1 = count;
    }
    return self;
}

//Setters and Getters for each of the three variables
-(void) setUsername: (NSString*) username {
    username = username;
}

-(NSString*) username {
    return username1;
}

-(void) setPassword: (NSString*) password {
    password = password;
}

-(NSString*) password {
    return password1;
}

-(void) setCount: (int) count{
    count = 0;
}

-(int) count {
    return count1;
}


+(SiteValue*) siteValueWithUsername: (NSString *)username andPassword: (NSString *)password andCount: (int) count {
    return [[SiteValue alloc]
            initWithUsername: username andPassword: password andCount: count];
}

//Other methods
-(BOOL) addUser: (NSMutableDictionary **) dictionary addKey: (NSString *)key {
    //Check if duplicate object, if not create the dictionary or add object
    //Create the dictionary
    if (!*dictionary)
    {
        *dictionary = [[NSMutableDictionary alloc] init];
    }
    for (NSString *key in *dictionary) {
        SiteValue *value = [*dictionary objectForKey: key];
        if ([[value username] isEqualToString: username1]) {
            NSLog (@"Error, Username Already Exists!");
            return NO;
        }
    }
    [*dictionary setObject:self forKey: key];
    NSLog (@"User Successfully Added!");
    return YES;
}


-(void) incrementCount{
    count1++;
}

// Print the dictionary
-(void) print: (NSMutableDictionary *) dictionary{
    for (SiteValue *SiteValue in dictionary) {
        NSLog (SiteValue.username, SiteValue.password, SiteValue.count);
    }
}


@end