• Add config SECURITY_SCHEMES and app.security_schemes attribute.
• Add security parameter to app.doc().

Example:

app = APIFlask(__name__)
app.security_schemes = {
    'ApiKeyAuth': {
      'type': 'apiKey',
      'in': 'header',
      'name': 'X-API-Key',
    }
}

@app.post('/pets')
@app.input(PetInSchema)
@app.output(PetOutSchema, 201)
@app.doc(security='ApiKeyAuth')  # <--
def create_pet(data):
    pet_id = len(pets)
    data['id'] = pet_id
    pets.append(data)
    return pets[pet_id]

This makes it possible to use external auth libraries.

• fixes Support using external authentication library #186

Checklist:

• Add tests that demonstrate the correct behavior of the change. Tests should fail without the change.
• Add or update relevant docs, in the docs folder and in code docstring.
• Add an entry in CHANGES.md summarizing the change and linking to the issue and your username.
• Add *Version changed* or *Version added* note in any relevant docs and docstring.
• Run pytest and tox, no tests failed.