import { Injectable } from '@angular/core';
import { Apollo } from 'apollo-angular';

export interface Auth {
  token: string;
  userId: string;
}

@Injectable({
  providedIn: 'root',
})
export class AuthService {
  constructor(
    private readonly apollo: Apollo,
  ) { }

  getAuth = (): Auth | undefined => {
    try {
      const authString = localStorage.getItem('auth');

      if (authString === null) { return undefined; }

      return JSON.parse(authString) as Auth;
    } catch (e) {
      localStorage.removeItem('userId');

      return undefined;
    }
  }

  setAuth = async (auth: Auth | undefined) => {
    const client = this.apollo.getClient();

    client.stop();

    if (auth === undefined) {
      localStorage.removeItem('auth');
    } else {
      localStorage.setItem('auth', JSON.stringify(auth));
    }

    await client.resetStore();
    await client.reFetchObservableQueries();
  }
}

import { Injectable } from '@angular/core';
import { Apollo } from 'apollo-angular';

export interface Auth {
  token: string;
  userId: string;
}

@Injectable({
  providedIn: 'root',
})
export class AuthService {
  constructor(
    private readonly apollo: Apollo,
  ) { }

  getAuth = (): Auth | undefined => {
    try {
      const authString = localStorage.getItem('auth');

      if (authString === null) { return undefined; }

      return JSON.parse(authString) as Auth;
    } catch (e) {
      localStorage.removeItem('userId');

      return undefined;
    }
  }

  setAuth = async (auth: Auth | undefined) => {
    if (auth === undefined) {
      localStorage.removeItem('auth');
    } else {
      localStorage.setItem('auth', JSON.stringify(auth));
    }

    await this.apollo.getClient().resetStore();
  }
}

--- 
+++ 
@@ -29,12 +29,17 @@
   }
 
   setAuth = async (auth: Auth | undefined) => {
+    const client = this.apollo.getClient();
+
+    client.stop();
+
     if (auth === undefined) {
       localStorage.removeItem('auth');
     } else {
       localStorage.setItem('auth', JSON.stringify(auth));
     }
 
-    await this.apollo.getClient().resetStore();
+    await client.resetStore();
+    await client.reFetchObservableQueries();
   }
 }
Fix issues with Apollo and login/logout
