anchor.diff:        this.refreshToken,
         this.scopes,
         this.lifeSpan,
  -      this.application,
         this.createdAt,
         this.updatedAt});
   
  
positive.code:         'refresh_token': refreshToken,
          'scopes': scopes,
          'life_span': lifeSpan,
          'application': application,
          'created_at': createdAt == null ? null : createdAt.toIso8601String(),
          'updated_at': updatedAt == null ? null : updatedAt.toIso8601String()
        };
  
negative.code:   int lifeSpan;
  
    @override
    DateTime createdAt;
  
    @override
  