<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def find(cls, api_name):
 """ Find or create an API model object by name """

        if api_name in cls.apis_by_name:
            return cls.apis_by_name[api_name]
        api = cls(api_name)
        api._fetch_from_aws()
        if api.exists_in_aws:
            api._fetch_resources()
        cls.apis_by_name[api_name] = api
        return api