add id to scope and mobile_phone to context

src/Owin.Security.Providers.Salesforce/Provider/SalesforceAuthenticatedContext.cs

@@ -40,6 +40,7 @@ namespace Owin.Security.Providers.Salesforce
             LastName = TryGetValue(user, "last_name");
             TimeZone = TryGetValue(user, "timezone");
             Active = TryGetValue(user, "active");
+            MobilePhone = TryGetValue(user, "mobile_phone");
         }
 
         /// <summary>
@@ -121,6 +122,11 @@ namespace Owin.Security.Providers.Salesforce
         /// </summary>
         public string Active { get; private set; }
 
+        /// <summary>
+        /// Gets the user's mobile phone number
+        /// </summary>
+        public string MobilePhone { get; private set; }
+
         /// <summary>
         /// Gets the <see cref="ClaimsIdentity"/> representing the user
         /// </summary>

src/Owin.Security.Providers.Salesforce/SalesforceAuthenticationOptions.cs

@@ -123,7 +123,7 @@ namespace Owin.Security.Providers.Salesforce
             Caption = Constants.DefaultAuthenticationType;
             CallbackPath = new PathString("/signin-salesforce");
             AuthenticationMode = AuthenticationMode.Passive;
-            Scope = new List<string>();
+            Scope = new List<string> { "id" };
             BackchannelTimeout = TimeSpan.FromSeconds(60);
             Endpoints = new SalesforceAuthenticationEndpoints
             {