Save token after HA refresh grant and refresh 3 min before expiration (#715)

Author: armanddidierjean

app/core/payment/payment_tool.py

@@ -77,14 +77,19 @@ def get_access_token(self) -> str:
             self._refresh_token = tokens["refresh_token"]
             self._access_token_expiry = tokens["expires_at"]
         # If we have a token but it's expired, we need to refresh it
+        # We refresh the token if it's expired or if it's about to expire in less than 3 minutes
         elif self._access_token_expiry is None or self._access_token_expiry < int(
-            datetime.now(UTC).timestamp(),
+            datetime.now(UTC).timestamp() - 3 * 60,
         ):
             # Token is expired, we need to refresh it
             try:
                 tokens = self._auth_client.refresh_token(
                     refresh_token=self._refresh_token,
                 )
+                self._access_token = tokens["access_token"]
+                self._refresh_token = tokens["refresh_token"]
+                self._access_token_expiry = tokens["expires_at"]
+                return self.get_access_token()
             except Exception:
                 hyperion_error_logger.exception(
                     "Payment: failed to refresh HelloAsso access token, getting a new one",