public LibraryUserController(
     AppDbContext db,
     ILibrarySessionService sessionService,
     IMapper mapper)
 {
     _db             = db;
     _sessionService = sessionService;
     _mapper         = mapper;
 }
 public BookController(
     AppDbContext db,
     IMapper mapper,
     ILibrarySessionService sessionService,
     IFileService fileService,
     IBookService bookService)
 {
     _db             = db;
     _mapper         = mapper;
     _sessionService = sessionService;
     _fileService    = fileService;
     _bookService    = bookService;
 }
 public LibraryController(AppDbContext db, IMapper mapper, ILibrarySessionService librarySessionService)
 {
     _db = db;
     _mapper = mapper;
     _sessionService = librarySessionService;
 }