text: #import <Foundation/Foundation.h>
  
  @interface IdentificationService : NSObject
  
  - (instancetype) initWithUserDefaults:(NSUserDefaults *) userDefaults;
  - (NSString *) getUserIdentification;
  - (BOOL) isUserIdentificationEmpty;
  - (void) saveUserIdentification: (NSString *) uid;
  @property (nonatomic, strong, readonly) NSUserDefaults *userDefaults;
  
  @end
  