Creates a new AuthManager instance using saved authentication settings.
The authentication and client configuration.
-Ensures the access token is valid and refreshes it if expired.
+Ensures the access token is valid and refreshes it if expired.
A promise that resolves to a valid access token.
-Exchanges an authorization code for access and refresh tokens.
+Exchanges an authorization code for access and refresh tokens.
The authorization code received from the OAuth flow.
A promise that resolves when tokens have been successfully obtained.
-Returns updated authentication-related settings that can be saved.
+Returns updated authentication-related settings that can be saved.
A partial settings object containing updated tokens and expiry.
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Manages OAuth2 authentication for accessing the Google contacts API. Handles exchanging authorization codes, refreshing access tokens, and providing updated credentials.
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