Angular re-initiate Class

Question

I have an API service in angular that I would like to reload when backend data is upadted (graphQL API addresses). More specifically, in the code below, I would like for the OnCreateReportListener to refresh as the API.graphql function will have new routes (that are contained in the API import.

import { Injectable } from "@angular/core";
import API, { graphqlOperation, GraphQLResult } from "@aws-amplify/api-graphql";
import { Observable } from "zen-observable-ts";

export class APIService {

      async CreateReport(
          input: CreateReportInput,
          condition?: ModelReportConditionInput
          ): Promise<CreateReportMutation> {
          const statement = `mutation CreateReport($input: CreateReportInput!, $condition: 
          ModelReportConditionInput) {
              createReport(input: $input, condition: $condition) {
                __typename
                id
                report
                user
                client
                timeStamp
              }
            }`;
          const gqlAPIServiceArguments: any = {
            input
          };
          if (condition) {
            gqlAPIServiceArguments.condition = condition;
          }
          const response = (await API.graphql(
            graphqlOperation(statement, gqlAPIServiceArguments)
          )) as any;
          return <CreateReportMutation>response.data.createReport;
        }

         OnCreateReportListener: Observable<
          SubscriptionResponse<OnCreateReportSubscription>
        > = API.graphql(
          graphqlOperation(
            `subscription onCreateReport {
              onCreateReport {
                __typename
                id
                report
                user
                client
                timeStamp
              }
            }`
          )
        ) as Observable<SubscriptionResponse<OnCreateReportSubscription>>;

}