AWS Rekognition on AWS Lambda

Question

I have been trying to use Boto3 on AWS Lambda for faceliveness detection according to this docs https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/rekognition.html

But I keep getting:

{
  "errorMessage": "'Rekognition' object has no attribute 'create_face_liveness_session'",
  "errorType": "AttributeError",
  "requestId": "349cb11a-9372-4e5e-b46d-95ecceff085a",
  "stackTrace": [
    "  File \"/var/task/RecogniseTest-6ed843a6-e80f-42bf-9c05-ed0507222161/lambda_function.py\", line 40, in lambda_handler\n    raise e\n",
    "  File \"/var/task/RecogniseTest-6ed843a6-e80f-42bf-9c05-ed0507222161/lambda_function.py\", line 34, in lambda_handler\n    response = create_liveness_session(request_token)\n",
    "  File \"/var/task/RecogniseTest-6ed843a6-e80f-42bf-9c05-ed0507222161/lambda_function.py\", line 17, in create_liveness_session\n    response = rekognition.create_face_liveness_session(\n",
    "  File \"/var/runtime/botocore/client.py\", line 876, in __getattr__\n    raise AttributeError(\n"
  ]
}

Meanwhile, create_face_liveness_session() is in the documentation.

My implementation:

import boto3
from decimal import Decimal
import json
import urllib.request
import urllib.parse
import urllib.error

print('Loading function')

rekognition = boto3.client('rekognition')

print(dir(rekognition))
# --------------- Helper Functions to call Rekognition APIs ------------------


def create_liveness_session(request_token):
    response = rekognition.create_face_liveness_session(
        ClientRequestToken=request_token
    )
    print(response)
    return response


# --------------- Main handler ------------------


def lambda_handler(event, context):
    print(event)
    if not 'body' in event:
        try:
            # request_body = json.loads(event['body'])
            request_token = event.get('request_token')
            print("Request Token: ", request_token)
            response = create_liveness_session(request_token)

            return response

        except Exception as e:
            print(e)
            raise e

Please help. Thanks

I was expecting to get sessionId after calling create_face_liveness_session().

Below are the available methods which goes against the documentation:

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