def certificate_get_all_by_user(context, user_id):
    return IMPL.certificate_get_all_by_user(context, user_id)
Create a vlan and bridge unless they already exist.
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/db/api.py/certificate_get_all_by_user--crossover with--dataset/ETHPy150Open nii-cloud/dodai-compute/nova/virt/vmwareapi/vif.py/VMWareVlanBridgeDriver.ensure_vlan_bridge