Meteor User Collection and Houston Admin

I created a test app and added Houston Admin. Added the role package but Houston Admin does not add a field to the user collection instead a separate collection. My question is simple, how to modify the Meteor user collection only to show email and password, and roles while creating the user in houston. I tried various attachschema using the following with no luck: I am using autoform 6 and simpl-schema

import SimpleSchema from ‘simpl-schema’;

SimpleSchema.extendOptions([‘autoform’, ‘denyInsert’, ‘denyUpdate’]);

// Using address schema from schema.org

Users= new SimpleSchema({
username: {
type: String,
optional: true
},
emails: {
type: Array,
optional: true
},
“emails.$”: {
type: Object
},
“emails.$.address”: {
type: String,
regEx: SimpleSchema.RegEx.Email
},
“emails.$.verified”: {
type: Boolean
},
createdAt: {
type: Date
},
services: {
type: Object,
optional: true,
blackbox: true
},
profile: {
type: Object,
optional: true,
},
‘profile.role’: {
type: String,
allowedValues: [‘admin’, ‘owner’, ‘client’]
},
heartbeat: {
type: Date,
optional: true
}
});

Meteor.users.attachSchema(Schema.Users);