在abp权限表中插入具有用户id和角色id的用户角色

using Volo.Abp.Identity;
using Volo.Abp.Identity.AspNetCore;
using Volo.Abp.PermissionManagement;

public class UserRoleService : IUserRoleService
{
    private readonly IIdentityUserRepository _userRepository;
    private readonly IIdentityRoleRepository _roleRepository;
    private readonly IPermissionGrantRepository _permissionGrantRepository;

    public UserRoleService(
        IIdentityUserRepository userRepository,
        IIdentityRoleRepository roleRepository,
        IPermissionGrantRepository permissionGrantRepository)
    {
        _userRepository = userRepository;
        _roleRepository = roleRepository;
        _permissionGrantRepository = permissionGrantRepository;
    }

    public async Task AddUserRole(Guid userId, Guid roleId)
    {
        var user = await _userRepository.GetAsync(userId);
        var role = await _roleRepository.GetAsync(roleId);

        if (user != null && role != null)
        {
            await _permissionGrantRepository.InsertAsync(new PermissionGrant(Guid.NewGuid(), role.Id, user.Id));
        }
    }
}