增加Shop API

Modules/Store.Users/Repositories/UserRepository.cs

@@ -5,13 +5,13 @@ namespace Store.Users.Repositories;
 
 public interface IUserRepository : IBaseRepository<UserEntity>
 {
-    Task<UserEntity> GetUser(string userName);
+    Task<UserEntity?> GetUser(string userName);
 }
 
 /// <summary>集中处理旧系统主子账号的有效计费配置和积分权限继承。</summary>
 internal class UserRepository(IFreeSql freeSql) : BaseRepository<UserEntity>(freeSql), IUserRepository, ITransientDependency
 {
-    public async Task<UserEntity> GetUser(string userName)
+    public async Task<UserEntity?> GetUser(string userName)
     {
         var user = await Where(u => u.UserName == userName).FirstAsync();
         if (user == null || user.IsMainUser) return user;