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[danielatgoogle]

Hello DevRel friends!

Description

Working with @gtondello, I'm uploading code samples for the Google Chat Advanced Service in Apps Script launch.

Fixes # (issue)

Is it been tested?

• [X] Development testing done

Checklist

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [X] I have performed a peer-reviewed with team member(s)
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have made corresponding changes to the documentation
• [X] My changes generate no new warnings
• [X] Any dependent changes have been merged and published in downstream modules

[snippet-bot[bot]]

Here is the summary of changes.

You are about to add 5 region tags.

- [advanced/chat.gs:17](https://github.com/googleworkspace/apps-script-samples/blob/00f7d1c0cbf51c7c1696e4ec904c7027a81358cf/advanced/chat.gs#L17), tag `chat_post_message_with_user_credentials` - [advanced/chat.gs:33](https://github.com/googleworkspace/apps-script-samples/blob/00f7d1c0cbf51c7c1696e4ec904c7027a81358cf/advanced/chat.gs#L33), tag `chat_post_message_with_app_credentials` - [advanced/chat.gs:57](https://github.com/googleworkspace/apps-script-samples/blob/00f7d1c0cbf51c7c1696e4ec904c7027a81358cf/advanced/chat.gs#L57), tag `chat_get_space` - [advanced/chat.gs:74](https://github.com/googleworkspace/apps-script-samples/blob/00f7d1c0cbf51c7c1696e4ec904c7027a81358cf/advanced/chat.gs#L74), tag `chat_create_space` - [advanced/chat.gs:89](https://github.com/googleworkspace/apps-script-samples/blob/00f7d1c0cbf51c7c1696e4ec904c7027a81358cf/advanced/chat.gs#L89), tag `chat_list_memberships`

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