How to use the adal.authentication_context.AuthenticationContext function in adal

def create_authentication_context_stub(self, authority):
            context = AuthenticationContext(authority, False)
            context.authority._tokenEndpoint = authority + cp['tokenPath']
            return context

def test_dsts_authority(self):
        try:
            context = AuthenticationContext(self.dstsTestEndpoint)
        except:
            self.fail("AuthenticationContext() rased an exception on dstsTestEndpoint")

def test_bad_url_not_https(self):
        with six.assertRaisesRegex(self, ValueError, "The authority url must be an https endpoint\."):
            context = AuthenticationContext('http://this.is.not.https.com/mytenant.com')

def acquire_token_with_username_password(self, authority, resource, username, password, client_id, tenant):
        authority_uri = authority

        if tenant is not None:
            authority_uri = authority + '/' + tenant

        context = AuthenticationContext(authority_uri)
        token_response = context.acquire_token_with_username_password(resource, username, password, client_id)
        return AADTokenCredentials(token_response)

def acquire_token_with_username_password(self, authority, resource, username, password, client_id, tenant):
        authority_uri = authority

        if tenant is not None:
            authority_uri = authority + '/' + tenant

        context = AuthenticationContext(authority_uri)
        token_response = context.acquire_token_with_username_password(resource, username, password, client_id)
        return AADTokenCredentials(token_response)

def acquire_token_with_username_password(self, authority, resource, username, password, client_id, tenant):
        authority_uri = authority

        if tenant is not None:
            authority_uri = authority + '/' + tenant

        context = AuthenticationContext(authority_uri)
        token_response = context.acquire_token_with_username_password(resource, username, password, client_id)

        return AADTokenCredentials(token_response)

def acquire_token_with_username_password(self, authority, resource, username, password, client_id, tenant):
        authority_uri = authority

        if tenant is not None:
            authority_uri = authority + '/' + tenant

        context = AuthenticationContext(authority_uri)
        token_response = context.acquire_token_with_username_password(resource, username, password, client_id)
        return AADTokenCredentials(token_response)

def acquire_token_with_username_password(self, authority, resource, username, password, client_id, tenant):
        authority_uri = authority

        if tenant is not None:
            authority_uri = authority + '/' + tenant

        context = AuthenticationContext(authority_uri)
        token_response = context.acquire_token_with_username_password(resource, username, password, client_id)

        return AADTokenCredentials(token_response)

def acquire_token_with_username_password(self, authority, resource, username, password, client_id, tenant):
        authority_uri = authority

        if tenant is not None:
            authority_uri = authority + '/' + tenant

        context = AuthenticationContext(authority_uri)
        token_response = context.acquire_token_with_username_password(resource, username, password, client_id)
        return AADTokenCredentials(token_response)