def create_users_table(dynamodb):
    dynamodb.create_table(
        TableName='users',
        KeySchema=[{
            'AttributeName': 'username',
            'KeyType': 'HASH'
        }],
        AttributeDefinitions=[{
            'AttributeName': 'username',
            'AttributeType': 'S'
        }],
        ProvisionedThroughput={
            'ReadCapacityUnits': 9,
            'WriteCapacityUnits': 9
        }
    )