add support for ms teams

lib/models/service-provider.js

@@ -29,6 +29,10 @@ ServiceProvider.fields = [
   {
     name: 'registration_hook',
     type: 'string',
+  },
+  {
+    name: 'ms_teams_fqdn',
+    type: 'string',
   }
 
 ];

lib/models/tenant.js

@@ -20,7 +20,8 @@ MsTeamsTenant.fields = [
   },
   {
     name: 'account_sid',
-    type: 'string'
+    type: 'string',
+    required: true
   },
   {
     name: 'application_sid',