class_docstr: Credentials Module Unittest class.
code: def test_show_emojis(self):
      self.assertIn("👋", email_prompt())
  
imports: import os
  import textwrap
  import unittest
  from pathlib import Path
  from unittest.mock import MagicMock, call, mock_open, patch
  import pytest
  import requests_mock
  from testfixtures import tempdir
  from streamlit import file_util
  from streamlit.runtime.credentials import Credentials, _Activation, _verify_email, email_prompt
label_desc: Use image node_id 2 for calling the CredentialsModulesTest obj's underlying member method code with example usage: obj.test_show_emojis() without return types