useMutation hook with logIn mutation doesn't sync data when user updates settings

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#1

I have a logIn mutation up in Context because I need it in multiple places in my app. It runs successfully when the app mounts, however when the user updates its settings, the changes aren’t in sync with the data. They are updated in cache, but not in the data variables themselves. Am I missing something obvious? Please advice.

const initialViewer: Viewer = {
  avatar:
    'https://lh3.googleusercontent.com/a-/AOh14GgON61oEh2hXDeGJ_uTAyUrzbfA_3iE_aDJH15SKQ=s100',
  didRequest: false,
  hasWallet: null,
  id: null,
  longBreakDuration: null,
  longBreakInterval: null,
  pomCount: null,
  pomCycle: null,
  pomDuration: null,
  pomData: null,
  shortBreakDuration: null,
  currentTasks: null,
  token: null
};

export type ContextValue =
  | undefined
  | {
      viewer: Viewer;
      setViewer: Dispatch<SetStateAction<Viewer>>;
      error: ApolloError;
    };

export const authContext = createContext<ContextValue>(undefined);

interface Props {
  children: ReactNode;
}

export const ProvideAuth: FunctionComponent = ({ children }: Props) => {
  const auth = useProvideAuth();
  return <authContext.Provider value={auth}>{children}</authContext.Provider>;
};

export const useAuth = () => {
  return useContext(authContext);
};

function useProvideAuth() {
  const [viewer, setViewer] = useState<Viewer>(initialViewer);

  const [logIn, { data, error }] = useMutation<LogInData, LogInVariables>(LOG_IN, {
    onCompleted: (data) => {
      if (data && data.logIn) {
        setViewer(data.logIn);

        if (data.logIn.token) {
          sessionStorage.setItem('token', data.logIn.token);
        } else {
          sessionStorage.removeItem('token');
        }
      }
    },
    onError: (err) => {
      console.log(err);
    }
  });
  const logInRef = useRef(logIn);

  useEffect(() => {
      logInRef.current({
        variables: {
          date: dayjs().format('MM-DD-YYYY')
        }
      });
  }, []);

  return {
    viewer,
    setViewer,
    error
  };
}