code: def create(cls, api_context, public_key_string):
          
  
          api_client = client.ApiClient(api_context)
          body_bytes = cls.generate_request_body_bytes(
              public_key_string
          )
          response_raw = api_client.post(cls._ENDPOINT_URL_POST, body_bytes, {})
  
          return cls._from_json_array_nested(response_raw)
docs: :type api_context: bunq.sdk.context.ApiContext
          :type public_key_string: str
  
          :rtype: client.BunqResponse[Installation]