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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Create client from service account stored in string","articleBody":"Hi,\r\n\r\nThis was raised in python-storage: https://github.com/googleapis/python-storage/issues/93\r\n\r\npython-cloud-core library has support for [from_service_account_json](https://github.com/googleapis/python-cloud-core/blob/master/google/cloud/client.py#L50-L84), which accepts a file path to a service account. \r\n\r\nFeature request is to add support to accept a json string of the service account. User stores the service account file contents in an environment variable instead of in a file.\r\n\r\n**Open question**: I'm not sure if this is a path that should be supported so I'm leaving that as an open question in this issue. If this feature is not supported then the workaround is to construct a credentials object and explicitly set a project id:\r\n\r\n```python\r\n# Storage example but is a general issue AFAIU\r\n\r\nimport os\r\nimport json\r\n\r\nfrom google.cloud import storage\r\nfrom google.oauth2 import service_account\r\n\r\ncredentials_json_string = \"{...service account....}\"\r\n\r\ncredentials_json = json.loads(credentials_json_string)\r\ncredentials = service_account.Credentials.from_service_account_info(credentials_json)\r\n\r\n# Credentials has project_id already so project should be optional but it's not.\r\nclient = storage.Client(project=credentials['project_id'], credentials=credentials)\r\n\r\nprint(list(client.list_buckets()))\r\n```\r\n\r\n## Proposal:\r\n\r\n```python\r\n    @classmethod\r\n    def from_service_account_json_string(cls, json_credentials, *args, **kwargs):\r\n        \"\"\"Factory to create credentials with provided json_credentials.\r\n        :type json_credentials: str\r\n        :param json_credentials: The contents of a private key file. This string must contain\r\n                                      a JSON object with a private key and\r\n                                      other credentials information (downloaded\r\n                                      from the Google APIs console).\r\n        :type args: tuple\r\n        :param args: Remaining positional arguments to pass to constructor.\r\n        :param kwargs: Remaining keyword arguments to pass to constructor.\r\n        :rtype: :class:`_ClientFactoryMixin`\r\n        :returns: The client created with the provided JSON credentials.\r\n        :raises TypeError: if there is a conflict with the kwargs\r\n                 and the credentials created by the factory.\r\n        \"\"\"\r\n        if \"credentials\" in kwargs:\r\n            raise TypeError(\"credentials must not be in keyword arguments\")\r\n        credentials_info = json.load(json_credentials)\r\n        credentials = service_account.Credentials.from_service_account_info(\r\n            credentials_info\r\n        )\r\n        if cls._SET_PROJECT:\r\n            if \"project\" not in kwargs:\r\n                kwargs[\"project\"] = credentials_info.get(\"project_id\")\r\n\r\n        kwargs[\"credentials\"] = credentials\r\n        return cls(*args, **kwargs)\r\n```","author":{"url":"https://github.com/frankyn","@type":"Person","name":"frankyn"},"datePublished":"2020-04-17T23:39:35.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/8/python-cloud-core/issues/8"}