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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create(self, credentials, friendly_name=values.unset, account_sid=values.unset):
 """ Create a new AwsInstance :param unicode credentials: A string that contains the AWS access credentials in the format <AWS_ACCESS_KEY_ID>:<AWS_SECRET_ACCESS_KEY> :param unicode friendly_name: A string to describe the resource :param unicode account_sid: The Subaccount this Credential should be associated with. :returns: Newly created AwsInstance :rtype: twilio.rest.accounts.v1.credential.aws.AwsInstance """

        data = values.of({
            'Credentials': credentials,
            'FriendlyName': friendly_name,
            'AccountSid': account_sid,
        })

        payload = self._version.create(
            'POST',
            self._uri,
            data=data,
        )

        return AwsInstance(self._version, payload, )