Cloud Function to run policy - AssertionError: Resource:gcp.sql-instance not loaded

[ArijZouaoui]

Hello,
I'm trying to write a cloud function to run my policy.yml file. Even though everything is fine with the policy (I tested it with the custodian run command), I'm getting an assertion error when running the cloud function saying that the resource can not be loaded. The error os occuring on the from_data method.

Here's the code I'm using:

def run_policy():
    policy_file = "./policy.yml"  
    with open(policy_file, 'r') as f:
        policy_data = yaml_load(f.read())
    print (policy_data)
    
   project_id = os.environ['GCP_PROJECT']
    config = Config.empty(
        region="europe-west9",
        output_dir="./output_dir",
        account_id=project_id ,
         metrics_enabled=False,
        cache="~/.cache/cloud-custodian.cache",
        log_group=None, 
        profile=None, 
        external_id=None)

    policy_collection = PolicyCollection.from_data( policy_data,  config)

I'm doubting that its either an authorization problem or somthing is wrong with my Config object, but I don't really know how to fix this.
Please let me know if you have any insights about this, thank you!