def set_msi_id(request_body, id_type, id_value)
      user_assigned_identity = USER_ASSIGNED_IDENTITY.dup
      request_body = [request_body, user_assigned_identity].join(',')
      request_body['{id_type}'] = id_type
      request_body['{user_assigned_identity}'] = ERB::Util.url_encode(id_value)

      return request_body
    end
def set_msi_id(request_body, id_type, id_value)
      user_assigned_identity = USER_ASSIGNED_IDENTITY.dup
      request_body = [request_body, user_assigned_identity].join(',')
      request_body['{id_type}'] = id_type
      request_body['{user_assigned_identity}'] = ERB::Util.url_encode(id_value)

      return request_body
    end
Sets user assigned identity value in request body
 @param request_body [String] body of the request used to acquire token
 @param id_type [String] type of id to send 'client_id', 'object_id' or 'msi_res_id'
 @param id_value [String] id of the user assigned identity

 @return [String] new request body with the addition of <id_type>=<id_value>.