'Creates a new log stream in the specified log group. The name
of the log stream must be unique within the log group. There
is no limit on the number of log streams that can exist in a
log group.
You must use the following guidelines when naming a log
stream:
+ Log stream names can be between 1 and 512 characters long.
+ The \':\' colon character is not allowed.
:type log_group_name: string
:param log_group_name:
:type log_stream_name: string
:param log_stream_name:'

def create_log_stream(self, log_group_name, log_stream_name):

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