'Creates a new log group with the specified name. The name of
the log group must be unique within a region for an AWS
account. You can create up to 100 log groups per account.
You must use the following guidelines when naming a log group:
+ Log group names can be between 1 and 512 characters long.
+ Allowed characters are az, AZ, 09, \'_\' (underscore), \'-\'
(hyphen), \'/\' (forward slash), and \'.\' (period).
Log groups are created with a default retention of 14 days.
The retention attribute allow you to configure the number of
days you want to retain log events in the specified log group.
See the `SetRetention` operation on how to modify the
retention of your log groups.
:type log_group_name: string
:param log_group_name:'

def create_log_group(self, log_group_name):

    params = {'logGroupName': log_group_name}
    return self.make_request(action='CreateLogGroup', body=json.dumps(params))
