Currently to generate the client you need to use the DIDx fork of OpenAPI generator and build the JAR yourself.
# Clone projects
git clone https://github.com/didx-xyz/aries-cloudcontroller-python
git clone https://github.com/OpenAPITools/openapi-generator
# Build OpenAPI generator JAR
cd openapi-generator
git checkout v7.9.0 # A tag of the openapi-generator version used to generate cloudcontroller
mvn -B --no-snapshot-updates clean package -DskipTests=true -Dmaven.javadoc.skip=true -Djacoco.skip=truecd aries-cloudcontroller-python
pip install -r requirements.txt -r requirements.dev.txt --upgrade
./generator/scripts/generate-client.sh 1.1.0 # Or other ACA-Py version