Auth error:Error: Invalid_grant ERROR: Error: 14 UNAVAILABLE: Getting metadata from plugin failed with error: invalid_grant

[matheustorsani]

• OS:
• Node.js version: 16.1.0
• npm version: 7.12.1
• nodejs-assistant version: 1.8.0

This is my code:

const {Assistant, AssistantLanguage} = require('nodejs-assistant')
const credentials = require('../assistent.json');

const assistant = new Assistant( {
  type: 'authorized_user',
  client_id: credentials.client_id,
  client_secret: credentials.client_secret,
  private_key_id: credentials.private_key_id,
  private_key: credentials.private_key,
  refresh_token: credentials.token_uri,
});

return:

ERROR: Error: 14 UNAVAILABLE: Getting metadata from plugin failed with error: invalid_grant

how can i solve?