Uses the stored refresh token to obtain a new access token without requiring user interaction.
Value
Invisibly returns a list containing the new access_token,
refresh_token, token_type, and expires_in.
Details
Access tokens expire after 30 days. Call this function to obtain a new access token using the refresh token that was stored during the initial authorization.
If the refresh token is also expired or revoked (e.g., user changed
password), you will need to run eg_oauth_authorize() again.
See also
eg_oauth_authorize() for the initial authorization.