import requests

def get_auth_token(username:str,credentials:str) ->dict:
    url = f"{HOSTS['arc_api']}/identity/public/v1/auth/login"
    payload = {
        "userName":username,
        "credentials":credentials,
        "grantType": "password",
    }
    headers = {
        'content-type': 'application/json',
        'accept': '*/*',
    }
    response = requests.post(url, headers=headers, data=json.dumps(payload))
    return response.json()