public async Task FindByIdAsync()

in app/Data/AppUserStore.cs [56:68]

• 11 lines of code
• 3 McCabe index (conditional complexity)

        public async Task<AppUser> FindByIdAsync(string userId, CancellationToken cancellationToken)
        {
            cancellationToken.ThrowIfCancellationRequested();
            if (userId == null) throw new ArgumentNullException(nameof(userId));

            Guid idGuid;
            if(!Guid.TryParse(userId, out idGuid))
            {
                throw new ArgumentException("Not a valid Guid id", nameof(userId));
            }

            return await _context.Users.FirstOrDefaultAsync(m => m.Id == idGuid);
        }