'Creates a display name for a customer master key. An alias can
be used to identify a key and should be unique. The console
enforces a one-to-one mapping between the alias and a key. An
alias name can contain only alphanumeric characters, forward
slashes (/), underscores (_), and dashes (-). An alias must
start with the word "alias" followed by a forward slash
(alias/). An alias that begins with "aws" after the forward
slash (alias/aws...) is reserved by Amazon Web Services (AWS).
:type alias_name: string
:param alias_name: String that contains the display name. Aliases that
begin with AWS are reserved.
:type target_key_id: string
:param target_key_id: An identifier of the key for which you are
creating the alias. This value cannot be another alias.'

def create_alias(self, alias_name, target_key_id):

    params = {'AliasName': alias_name, 'TargetKeyId': target_key_id}
    return self.make_request(action='CreateAlias', body=json.dumps(params))
