from starlette import status as status

from .applications import FastAPI as FastAPI
from .background import BackgroundTasks as BackgroundTasks
from .datastructures import UploadFile as UploadFile
from .exceptions import HTTPException as HTTPException
from .exceptions import WebSocketException as WebSocketException
from .param_functions import Body as Body
from .param_functions import Cookie as Cookie
from .param_functions import Depends as Depends

# -*- coding: utf-8 -*-
import json
# standard.
import os

import certifi
# Dependencies
import urllib3
from botocore.credentials import CredentialProvider, RefreshableCredentials
from botocore.exceptions import CredentialRetrievalError
from dateutil.parser import parse

from .sts_element import STSElement


class ClientGrantsCredentialProvider(CredentialProvider):
    """