def delete_keyvault_secret(access_token, vault_uri, secret_name):
    '''Deletes a secret from a key vault using the key vault URI. 

    Args:
        access_token (str): A valid Azure authentication token.
        vault_uri (str): Vault URI e.g. https://myvault.azure.net.
        secret_name (str): Name of the secret to add.

    Returns:
        HTTP response. 200 OK.
    '''
    endpoint = ''.join([vault_uri,
                    '/secrets/', secret_name,
                    '?api-version=', '7.0'])
    return do_delete(endpoint, access_token)
Deletes a secret from a key vault using the key vault URI. 

    Args:
        access_token (str): A valid Azure authentication token.
        vault_uri (str): Vault URI e.g. https://myvault.azure.net.
        secret_name (str): Name of the secret to add.

    Returns:
        HTTP response. 200 OK.