Initial WIP code for user management (#1838)

* Initial user management code

* WIP

* Fix whitespace

* WIP user objects

* WIP user objects

* Cleanup ported code

* WIP

* WIP

* Update the User contracts

* Additional cleanups

* Remove warning silencing which isn't intended for this PR

* Fix some warnings as error in CI

src/Microsoft.SqlTools.ServiceLayer/Security/Contracts/LoginRequest.cs

@@ -0,0 +1,66 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using Microsoft.SqlTools.Hosting.Protocol.Contracts;
+using Microsoft.SqlTools.ServiceLayer.Utility;
+using Microsoft.SqlTools.Utility;
+
+namespace Microsoft.SqlTools.ServiceLayer.Security.Contracts
+{    
+    /// <summary>
+    /// Create Login parameters
+    /// </summary>
+    public class CreateLoginParams : GeneralRequestDetails
+    {
+        public string OwnerUri { get; set; }
+
+        public LoginInfo Login { get; set; }
+    }
+
+    /// <summary>
+    /// Create Login result
+    /// </summary>
+    public class CreateLoginResult : ResultStatus
+    {
+        public LoginInfo Login { get; set; }        
+    }
+
+
+    /// <summary>
+    /// Create Login request type
+    /// </summary>
+    public class CreateLoginRequest
+    {
+        /// <summary>
+        /// Request definition
+        /// </summary>
+        public static readonly
+            RequestType<CreateLoginParams, CreateLoginResult> Type =
+            RequestType<CreateLoginParams, CreateLoginResult>.Create("security/createlogin");
+    }
+
+    /// <summary>
+    /// Delete Login params
+    /// </summary>
+    public class DeleteLoginParams : GeneralRequestDetails
+    {
+        public string OwnerUri { get; set; }
+
+        public string LoginName { get; set; }
+    }
+
+    /// <summary>
+    /// Delete Login request type
+    /// </summary>
+    public class DeleteLoginRequest
+    {
+        /// <summary>
+        /// Request definition
+        /// </summary>
+        public static readonly
+            RequestType<DeleteLoginParams, ResultStatus> Type =
+            RequestType<DeleteLoginParams, ResultStatus>.Create("security/deletelogin");
+    }
+}