Add user avatar URL

src/Managing.Application.Abstractions/Services/IUserService.cs

@@ -7,5 +7,6 @@ public interface IUserService
     Task<User> Authenticate(string name, string address, string message, string signature);
     Task<User> GetUserByAddressAsync(string address);
     Task<User> UpdateAgentName(User user, string agentName);
+    Task<User> UpdateAvatarUrl(User user, string avatarUrl);
     User GetUser(string name);
 }