Have generated the API keys and am using them..
./attempt.py --url
https://mno-intersight.insieme.local/api/v1 --ignore-tls --api-key-legacy --api-key-id 5ebc75687564612d302d6<snip>4e39d7564612d3099a39b --api-key-file SecretKey.txt
2020-06-27 16:52:14,843 [INFO] [attempt.py:192] Using HTTP signature authentication
2020-06-27 16:52:14,907 [INFO] [attempt.py:107] Query Users
2020-06-27 16:52:14,918 [DEBUG] [connectionpool.py:937] Starting new HTTPS connection (1): mno-intersight.insieme.local:443
/usr/local/lib/python3.8/site-packages/urllib3-1.25.9-py3.8.egg/urllib3/connectionpool.py:979: InsecureRequestWarning: Unverified HTTPS request is being made to host 'mno-intersight.insieme.local'. Adding certificate verification is strongly advised. See:
https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warningswarnings.warn(
send: b'GET /api/v1/api/v1/iam/Users HTTP/1.1\r\nAccept-Encoding: identity\r\nAccept: application/json\r\nUser-Agent: OpenAPI-Generator/0.0.1.15153/python\r\nreferer:
https://mno-intersight.insieme.local/api/v1\r\nx-requested-with: XMLHttpRequest\r\nContent-Type: application/json\r\nHost: mno-intersight.insieme.local\r\nDate: Sat, 27 Jun 2020 23:52:14 GMT\r\nDigest: SHA-256=47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=\r\nAuthorization: Signature keyId="5ebc75687564<snip>612d3099a39b",algorithm="rsa-sha256",created=1593301934,expires=1593302234.907402,headers="(request-target) (created) (expires) host date digest content-type user-agent",signature="lPTcCnAJs1xS31emjXaF+<snip>udI1t+MjFj8aNiLBLi0x8BerL1addgtEu69oYW6xqwr5Sk6m5NDKKlOz24aQs9Tqe0PFcHh/iily3a3RzKPw=="\r\n\r\n'
reply: 'HTTP/1.1 401 Unauthorized\r\n'
header: Server: nginx
header: Date: Sat, 27 Jun 2020 23:47:33 GMT
header: Content-Type: application/json
header: Content-Length: 56
header: Connection: keep-alive
header: Www-Authenticate: Signature realm="mno-intersight.insieme.local", errorMessageId="iam_api_key_packet_not_yet_valid", errorMessage="Cannot perform the operation. The signature creation date in the 'Authorization' header is in the future."
header: X-Starship-TraceId: NB64d0a4b8d592abcf22fd579d6f280738
2020-06-27 16:52:15,592 [DEBUG] [connectionpool.py:433]
https://mno-intersight.insieme.local:443 "GET /api/v1/api/v1/iam/Users HTTP/1.1" 401 56
2020-06-27 16:52:15,592 [DEBUG] [rest.py:222] response body: b'{"error": {"status_code": 401,"status": "Unauthorized"}}'
2020-06-27 16:52:15,593 [ERROR] [attempt.py:264] Exception when calling API: (401)
Reason: Unauthorized