How to use the loopback4-authentication.STRATEGY.GOOGLE_OAUTH2 function in loopback4-authentication

where: {
        clientId: refreshPayload.clientId,
      },
    });
    if (!authClient) {
      throw new HttpErrors.Unauthorized(AuthErrorKeys.ClientInvalid);
    }
    return this.createJWT(
      {clientId: refreshPayload.clientId, userId: refreshPayload.userId},
      authClient,
    );
  }

  @authenticateClient(STRATEGY.CLIENT_PASSWORD)
  @authenticate(
    STRATEGY.GOOGLE_OAUTH2,
    {
      accessType: 'offline',
      scope: ['profile', 'email'],
      authorizationURL: process.env.GOOGLE_AUTH_URL,
      callbackURL: process.env.GOOGLE_AUTH_CALLBACK_URL,
      clientID: process.env.GOOGLE_AUTH_CLIENT_ID,
      clientSecret: process.env.GOOGLE_AUTH_CLIENT_SECRET,
      tokenURL: process.env.GOOGLE_AUTH_TOKEN_URL,
    },
    (req: Request) => {
      return {
        accessType: 'offline',
        state: Object.keys(req.query)
          .map(key => key + '=' + req.query[key])
          .join('&'),
      };