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

expiresIn: this.client.authCodeExpiration,
        audience: req.client_id,
        subject: req.username,
        issuer: process.env.JWT_ISSUER,
      });
      return {
        code: token,
      };
    } catch (error) {
      throw new HttpErrors.InternalServerError(
        AuthErrorKeys.InvalidCredentials,
      );
    }
  }

  @authenticateClient(STRATEGY.CLIENT_PASSWORD)
  @authenticate(STRATEGY.OAUTH2_RESOURCE_OWNER_GRANT)
  @authorize(['*'])
  @post('/auth/login-token', {
    responses: {
      [STATUS_CODE.OK]: {
        description: 'Token Response Model',
        content: {
          [CONTENT_TYPE.JSON]: {
            schema: {'x-ts-type': TokenResponse},
          },
        },
      },
    },
  })
  async loginWithClientUser(
    @requestBody() req: LoginRequest,