fix: do not sent user header if version is unavailable #834

	name: Test things on pushes

	on: [push, pull_request]

	jobs:
	lint-and-test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.8, 3.12]
	steps:
	- uses: actions/checkout@v4
	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}
	- name: Setup Poetry
	uses: Gr1N/setup-poetry@v9
	- name: Install deps
	run: poetry install --extras "dev" --extras "types"
	- name: Lint with mypy
	run: \|
	poetry run mypy aleph_alpha_client
	poetry run mypy tests --ignore-missing-imports
	- name: Run tests
	run: \|
	poetry run pytest
	env:
	TEST_API_URL: https://api.aleph-alpha.com
	TEST_TOKEN: ${{ secrets.AA_API_TOKEN }}

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