Get business Role of Logged in user

Hi All,

I am trying to get the Business Role Name and ID of the logged in person through JavaScript. I tried various ways like through FetchXML or Odata Query, I could not achieve this. 

Ex: I (Demo User) have logged into Dynamcis CRM, I have to allow him to create a record only if he has a "Business Role like 'Account Manager' " . I wanted to achieve this through JavaScript.

Let me know the JS achieve this.

Thanks!