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Asynchronous messages require authentication The following diagram shows a basic asynchronous message sequence between a Chat app and a Chat space: Figure 3.

Post a message to the Chat space to give details about the outage.

Create a Chat space dedicated to investigating and fixing the outage.

For example, after detecting a server outage, a Chat app can call the Chat API to: Asynchronous messages require authenticationĪsynchronous messages occur when a Chat app makes a request to the Chat REST API, which requires authentication and authorization.īy calling the REST API, Chat apps can post messages to Google Chat or complete tasks and access data on a user's behalf. This sequence repeats for each Chat event.

Google Chat renders the response for the user, or in a space.

The app receives the message, processes it, and returns a response to Google Chat.

Google Chat forwards the message to the app.

The user sends a message to the Chat app in Google Chat.

Synchronous messages don't require authentication The following diagram shows a basic synchronous request-response sequence between a Chat user and Chat app: Figure 2.

A user invokes one of the Chat app's slash commands.A user sends a message to a Chat app in Google Chat.Google Chat apps are able to receive and respond to events after being configured and published on the Chat app configuration page, and do not require authentication or authorization.Įxamples of synchronous Chat events include: Synchronous messages are responses to Chat events. To send asynchronous messages or work on a user's behalf, Chat apps make RESTful requests to the Chat REST API, which require authentication and authorization. Synchronous messages don't require authentication, unless the Chat app calls the Chat REST API or another Google API while processing a response. They can also complete tasks, like creating a Chat space, on a user's behalf. Request more resources: If your app needs more access, it asks the user to grant new scopes, resulting in a new request to get an access token (steps 3–6).Ĭhat apps can message Google Chat synchronously or asynchronously. Get a refresh token (optional): If your app needs to access the Google Chat API beyond the lifetime of a single access token, it can get a refresh token. If the returned list of scopes is more limited than the requested scopes, your app turns off any features limited by the token.Īccess requested resources: Your app uses the access token from Google to invoke the Chat API and access Chat API resources.

Google returns an access token: The access token contains a list of granted scopes. The request is sent to the Google authorization server to obtain an access token. Send approved request for resources: If the user consents to the authorization scopes, your app bundles the credentials and the user-approved scopes into a request. Authentication with a service account doesn't require user consent. Request resources: Your app asks for access with scopes that you specify while setting up authentication.Īsk for consent: If your app is authenticating as a user, Google displays an OAuth consent screen so the user can decide whether to grant your app access to the requested data. If your app authenticates as a user, the user might receive a sign-in prompt. If your app authenticates with a service account, the credentials are sent as part of your app's code. In the Google Cloud project, you enable Chat API, configure your Chat app, and set up authentication.Ĭall Chat API: When your app calls the Chat REST API⁠-which usually happens after a user in Google Chat invokes the app by messaging it, clicking a button on a card, or issuing a slash command⁠-it sends authentication credentials to Chat API. High-level steps for Google Chat authentication and authorizationĬonfigure a Google Cloud project, enable Chat API, and configure your Chat app: During development, you create a Google Cloud project. The following diagram shows the high-level steps of authentication and authorization for Google Chat: Figure 1. This document outlines how authentication and authorization work for Chat apps and Chat API requests. Authenticating with service accounts is generally available.Īuthentication and authorization are mechanisms used to verify identity and access to resources, respectively. Developer Preview: Authenticating with user accounts is currently available as part of the Google Workspace Developer Preview Program, which grants early access to certain features.