Every request your application sends to the Fitness API must include an authorization token. The token also identifies your application to Google.
Authorizing requests with OAuth 2.0
All requests to the Fitness API must be authorized by an authenticated user.
The details of the authorization process, or "flow," for OAuth 2.0 will depend on what kind of application you're writing. This general process applies to all application types:
- When you create your application, register it using the Google API Console. Google then provides information you'll need later, such as a client ID and a client secret.
- Activate the Fitness API in the Google API Console. (If the API isn't listed in the API Console, then skip this step.)
- When your application needs access to user data, it asks Google for a particular scope of access. Determine which data types your app needs to access to understand which scopes your app needs to request.
- Google displays a consent screen to the user, asking them to authorize your application to request some of their data.
- If the user approves, then Google gives your application a short-lived access token.
- Your application requests user data, attaching the access token to the request.
- If Google determines that your request and the token are valid, it returns the requested data.