feat: add 400 error messages #198

	name: Test
	on: push
	jobs:
	build-n-test:
	name: Build and test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@master
	- name: Set up Python 3.9
	uses: actions/setup-python@v1
	with:
	python-version: 3.9

	- name: Install
	run: >-
	python -m
	pip install -r requirements.txt
	--user

	- name: Run tests
	run: python -m pytest

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