Create API key in AWS API Gateway from AWS Lambda using boto3

I am using an AWS Lambda function to create an API key using Boto3.

Testing locally with the following is successful:

import boto3

client = boto3.client('apigateway')

response = client.create_api_key(
    name='test_user_from_boto',
    description='This is the description',
    enabled=True,
    generateDistinctId=True,
    value='',
    stageKeys=[{
        'restApiId':'aaa',
        'stageName':'beta'
    }]
)

This works no problem returning a dictionary as expected. The return dictionary includes a value key that has the generated api key value which is what I'm after.

When doing something similar in AWS Lambda, the return dictionary does not include the value key.

This is my Lambda hander function.

import boto3


api_id = 'zzz'
plan_id_map = {
    'trial': 'aaa', 
    'basic': 'bbb', 
    'professional': 'ccc'
}

def handler(event, context):
    user_name = event['user_name']
    stage = event['stage']
    plan = event['plan']

    client = boto3.client('apigateway')
    api_key_response = client.create_api_key(
        name=user_name, 
        description='', 
        enabled=True, 
        # generateDistinctId=True, # including this argument throws an error
        # value='', # including this argument throws an error
        stageKeys=[{
            'restApiId': api_id, 
            'stageName': stage
        }]
    )

    user_key_id = api_key_response['id']
    user_api_key = api_key_response['value'] # throws a key error here

    plan_response = client.create_usage_plan_key(
        usagePlanId=plan_id_map[plan],
        keyId=user_key_id,
        keyType='API_KEY')    

    return {
        'user_name': user_name,
        'user_key_id': user_key_id,
        'user_api_key': user_api_key
    }

The results from printing api_key_response is the following:

{
    u'name': u'test_user_from_lambda', 
    'ResponseMetadata': {
        'HTTPStatusCode': 201, 
        'RequestId': 'b8298d38-7aec-11e6-8322-5bc341fc4b73', 
        'HTTPHeaders': {
            'x-amzn-requestid': 'b8298d38-7aec-11e6-8322-5bc341fc4b73',
            'date': 'Thu, 15 Sep 2016 02:33:00 GMT', 
            'content-length': '203', 
            'content-type': 'application/json'
        }
    },
    u'createdDate': datetime.datetime(2016, 9, 15, 2, 33, tzinfo=tzlocal()), 
    u'lastUpdatedDate': datetime.datetime(2016, 9, 15, 2, 33, tzinfo=tzlocal()), 
    u'enabled': True, 
    u'id': u'xyzxyz', 
    u'stageKeys': [u'abcabc/beta']
}

When attempting to use get_api_key, I get a parameter validation error:

get_api_key_response = client.get_api_key(
    apiKey='585yw0f1tk',
    includeValue=True
)

Unknown parameter in input: "includeValue", must be one of: apiKey: ParamValidationError

Is the AWSboto3 module modified to exclude the value key? How to return the generated api key?