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Missing parameter  #27

@rkitron

Description

@rkitron

Hi,

I'm trying to use this package with a RAM role,

I'm getting this error:
alibabacloud_credentials.exceptions.CredentialException: {"RequestId":"AB8B1489-426D-508E-9FB4-2D2849E14500","Message":"Timestamp is mandatory for this action.","Recommend":"https://next.api.aliyun.com/troubleshoot?q=MissingTimestamp&product=Sts","HostId":"sts.aliyuncs.com","Code":"MissingTimestamp"}

Finally, all these parameters were missing (in provider.py.RamRoleArnCredentialProvider):
'Timestamp': datetime.datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%SZ"),
'SignatureNonce': UtilClient.get_nonce(),
'SignatureMethod': 'HMAC-SHA1',
'SignatureVersion': '1.0'

My code:

from alibabacloud_ecs20140526.models import DescribeInstancesRequest

from alibabacloud_ecs20140526.client import Client as EcsClient

from alibabacloud_credentials.client import Client
from alibabacloud_credentials.models import Config

from alibabacloud_tea_openapi.models import Config as OpenAPIConfig

config = Config(
    type='ram_role_arn',
    access_key_id='********',
    access_key_secret='******',
    role_session_name='test',
    #security_token='',
    role_arn='acs:ram::********:role/**********',
)
cred = Client(config)

ecsClient = EcsClient(OpenAPIConfig(credential=cred, region_id='cn-shanghai'))
req = DescribeInstancesRequest()
ecsClient.describe_instances(req)

Thanks,

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