sso integrations (#822)

* stub out hybrid sso

* support for PKCE authorization_code clients

* sso service urls

* sso client key

* abstract request validator

* support for verifying password

* custom AuthorizationCodeStore that does not remove codes

* cleanup

* comment

* created master password

* ResetMasterPassword

* rename Sso client to OidcIdentity

* update env builder

* bitwarden sso project in docker-compose

* sso path in nginx config

src/Core/Models/Api/Request/Accounts/VerifyPasswordRequestModel.cs

@@ -0,0 +1,12 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace Bit.Core.Models.Api
+{
+    public class VerifyPasswordRequestModel
+    {
+        [Required]
+        [StringLength(300)]
+        public string MasterPasswordHash { get; set; }
+    }
+}