public async Task <TEntity> SelectByIdAsync(TKey id)
 {
     try
     {
         Expression <Func <TEntity, bool> > predicate = t => t.Id.Equals(id);
         return(await _context.Set <TEntity>().FirstOrDefaultAsync(predicate));
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }
 public GenericRepository(BeTheHeroSQLiteContext context)
 {
     _context = context;
     _db      = _context.Set <TEntity>();
 }