Sticker constructor 
    
      
      Sticker({ - required Snowflake id, 
 
- Snowflake? packId, 
 
- required String name, 
 
- required String? description, 
 
- required String tags, 
 
- String? asset, 
 
- required int type, 
 
- required int formatType, 
 
- bool? available, 
 
- Snowflake? guildId, 
 
- User? user, 
 
- int? sortValue, 
 
})
    
    
    
  Implementation
  Sticker(
    {required this.id,
    this.packId,
    required this.name,
    required this.description,
    required this.tags,
    this.asset,
    required this.type,
    required this.formatType,
    this.available,
    this.guildId,
    this.user,
    this.sortValue});