Fix Teams Backend LoadUsers()

[golubenkoff]

Description

Fix Based on: https://docs.microsoft.com/en-us/microsoftteams/platform/resources/team-chat-member-api-changes https://docs.microsoft.com/en-us/microsoftteams/platform/bots/how-to/get-teams-context?tabs=json#tabpanel_CeZOj-G++Q_json

Related Issue

#244

Motivation and Context

This fix allowed us to continue with new changes

How Has This Been Tested?

Tested on BoshBot Windows Version with 9000+ users tenant

Screenshots (if appropriate):

Types of changes

• [ + ] Bug fix (LoadUsers())

Checklist:

• [ +] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[mengdahuang]

Hi, Sir Do you mind to write more about how to fix this issue based on current version of PoshBot? Thanks