Add project files.

Esiur/Security/Membership/IMembership.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Esiur.Data;
+using Esiur.Net.IIP;
+using Esiur.Engine;
+using Esiur.Security.Authority;
+using Esiur.Resource;
+
+namespace Esiur.Security.Membership
+{
+    public interface IMembership:IResource
+    {
+        //IUser[] GetUsers(QueryFilter<string> user);
+
+        //bool AddCertificate(Certificate certificate);
+
+        //CACertificate[] GetCACertificates(string authority);
+        //UserCertificate[] GetUserCertificate(string user, string domain);
+        //DomainCertificate[] GetDomainCertificates(string domain);
+
+
+        bool UserExists(string username);
+        AsyncReply<byte[]> GetPassword(string username, string domain);
+
+        //ClientAuthentication Authenticate(string username, byte[] credentials, int flag);
+        //HostAuthentication Authenticate(DomainCertificate domainCertificate);
+        //CoHostAuthentication Authenticate(DomainCertificate hostCertificate, int hostId);
+
+        /*
+        object GetUserInfo(User user, string field);
+        object[] GetUserInfo(User user, string[] fields);
+
+        bool SetUserInfo(User user, string field, object value);
+        bool SetUserInfo(User user, KeyList<string, object> info);
+        */
+
+        //bool AddUser(User user, KeyList<string, object> info);
+        //bool RemoveUser(string username);
+
+
+
+
+
+    }
+}