workflow_param_to_secret.py

from prefect import Flow, Parameter
from prefect.tasks.secrets import PrefectSecret

aws_secret = PrefectSecret(name=None) # initializes Task, unrelated to binding it within a Flow


with Flow("parameter_to_secret") as flow:
    aws_credentials_secret_name = Parameter(
        'aws_credentials_secret_name', default='AWS_CREDENTIALS',
    )
    aws_credentials = aws_secret(name=aws_credentials_secret_name)
    aws_credentials['ACCESS_KEY']


flow.run()