This allows users of pip to specify a dependency on requests during the
pip install process, e.g. `pip install google-auth[requests]`.

This resolves
#1069.

)

* feat: wrap all python built-in exceptions into library excpetions

* remove wrapped StopIteration since it will never thrown

…s and region are retrievable through the environment variables (#1195)

* feat: AwsCredentials should not call metadata server if security creds and region are retrievable through the environment variables

* add verification of metadata token request not called

* Adding new coverage of test and address comments

* add previous missing period

Co-authored-by: Leo <[email protected]>

…cp/templates/python_library/.kokoro (#1200)

Source-Link: googleapis/synthtool@b4fe62e
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:3bf87e47c2173d7eed42714589dc4da2c07c3268610f1e47f8e1a30decbfc7f1

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

* chore: update token

* pin the cryptography library version

* pin the cryptography library version

* using less operator to try

…nses from non-compliant services (#1208)

This fixes #1207.

…red files. (#1206)

* chore: update systest creds

* chore: fix unit test

* fix: allow get_project_id to take a request

* Adding Args/Return

* Updating documentation

Co-authored-by: Jin <[email protected]>
Co-authored-by: arithmetic1728 <[email protected]>

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>