Add implementation of AppAuthClient for default (sync & async) clients. #443

	name: Cargo Checks

	on: [push, pull_request]

	jobs:
	check:
	name: Cargo Checks
	runs-on: ubuntu-latest
	steps:
	- name: Checkout sources
	uses: actions/checkout@v4.2.2
	with:
	submodules: true

	- name: Set up Python
	uses: actions/setup-python@v5.3.0
	with:
	python-version: "3.10"

	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install packaging ply six

	- name: Run the generator
	run: python generate.py

	- name: Check generated files against repo
	run: if [[ ! -z `git status --porcelain=v1` ]]; then echo "::error::Workspace is dirty after running generator. Did you remember to check in the generated files?"; exit 1; fi

	- name: Install MSRV toolchain
	run: rustup install 1.75.0 --profile minimal

	- name: Run cargo test
	run: rustup run 1.75.0 cargo test --all-features

	- name: Install nightly toolchain
	run: \|
	rustup install nightly --profile minimal
	rustup component add clippy --toolchain nightly

	- name: Run clippy
	run: rustup run nightly cargo clippy --all-targets --all-features -- --deny warnings

	- name: Run clippy with minimal features (sync)
	run: rustup run nightly cargo clippy --no-default-features --features sync_routes,dbx_files

	- name: Run clippy with minimal features (async)
	run: rustup run nightly cargo clippy --no-default-features --features default_async_client,dbx_files

Provide feedback