@flow()
def obtain_kerberos_ticket(kerberos_block: KerberosCredentials) -> None:
   logger = get_run_logger()
   shell_run_command(
        command='echo "${PASSWORD}" | kinit USERNAME; klist',
        env={
            'USERNAME': kerberos_block.username,
            'PASSWORD': kerberos_block.password,
        },
        return_all=True)
    <http://logger.info|logger.info>("a kerberos tickets has been obtained")

TypeError: expected str, bytes or os.PathLike object, not SecretStr

from pydantic import SecretStr
from prefect.blocks.core import Block

class KerberosCredentials(Block):
   username: str
    password: SecretStr