moved UserManager to Managers namespace

Oqtane.Server/Managers/Interfaces/IUserManager.cs

@@ -0,0 +1,21 @@
+using System.Threading.Tasks;
+using Oqtane.Models;
+
+namespace Oqtane.Managers
+{
+    public interface IUserManager
+    {
+        User GetUser(int userid, int siteid);
+        User GetUser(string username, int siteid);
+        Task<User> AddUser(User user);
+        Task<User> UpdateUser(User user);
+        Task DeleteUser(int userid, int siteid);
+        Task<User> LoginUser(User user, bool setCookie, bool isPersistent);
+        Task<User> VerifyEmail(User user, string token);
+        Task ForgotPassword(User user);
+        Task<User> ResetPassword(User user, string token);
+        User VerifyTwoFactor(User user, string token);
+        Task<User> LinkExternalAccount(User user, string token, string type, string key, string name);
+        Task<bool> ValidatePassword(string password);
+    }
+}