创建UserClaimsPrincipalFactory工厂
在Project.Domain中创建ProjectUserClaimsPrincipalFactory

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Claims;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.Options;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Identity;
using Volo.Abp.Security.Claims;

namespace Dsh
{
    [Dependency(ReplaceServices = true)]
    [ExposeServices(typeof(AbpUserClaimsPrincipalFactory))] // 替换旧的AbpUserClaimsPrincipalFactory
    public class DshUserClaimsPrincipalFactory : AbpUserClaimsPrincipalFactory, IScopedDependency
    {
        public DshUserClaimsPrincipalFactory(
            UserManager<Volo.Abp.Identity.IdentityUser> userManager,
            RoleManager<Volo.Abp.Identity.IdentityRole> roleManager,
            IOptions<IdentityOptions> options,
            ICurrentPrincipalAccessor currentPrincipalAccessor,
            IAbpClaimsPrincipalFactory abpClaimsPrincipalFactory
            ) : base(userManager, roleManager, options, currentPrincipalAccessor, abpClaimsPrincipalFactory)
        {
        }
        public override async Task<ClaimsPrincipal> CreateAsync(Volo.Abp.Identity.IdentityUser user)
        {
            var principal = await base.CreateAsync(user);
            var identityPrincipal = principal.Identities.First();

            identityPrincipal.AddClaim(new Claim("author", "dsh"));

            return principal;
        }
    }
}

注意：这里使用特性自动替换服务，也可以手动替换服务
在实现了AbpModule的Module类的ConfigureServices(ServiceConfigurationContext context)方法中调用如下方法，对默认的实现进行替换

private void ConfigureCustomAuditing(ServiceConfigurationContext context)
{
    // 替换一个默认实现
    context.Services.Replace(ServiceDescriptor.Transient(typeof(IAuditPropertySetter), typeof(MyAuditPropertySetter)));
}

添加ApiResource，在Dsh.Domain项目IdentityServerDataSeedContributor.cs的CreateApiResourcesAsync方法中，为变量commonApiUserClaims数组添加定义的claim名称

private async Task CreateApiResourcesAsync()
{
    var commonApiUserClaims = new[]
    {
        "email",
        "email_verified",
        "name",
        "phone_number",
        "phone_number_verified",
        "role",
        "author"
    };

    await CreateApiResourceAsync("Dsh", commonApiUserClaims);
}

然后运行 Update-Database 或着运行DbMigrator项目来更新