How to use the pyzotero.zotero_errors.MissingCredentials function in pyzotero

self,
        library_id=None,
        library_type=None,
        api_key=None,
        preserve_json_order=False,
        locale="en-US",
    ):
        """ Store Zotero credentials
        """
        self.endpoint = "https://api.zotero.org"
        if library_id and library_type:
            self.library_id = library_id
            # library_type determines whether query begins w. /users or /groups
            self.library_type = library_type + "s"
        else:
            raise ze.MissingCredentials(
                "Please provide both the library ID and the library type"
            )
        # api_key is not required for public individual or group libraries
        self.api_key = api_key
        self.preserve_json_order = preserve_json_order
        self.locale = locale
        self.url_params = None
        self.tag_data = False
        self.request = None
        self.snapshot = False
        # these aren't valid item fields, so never send them to the server
        self.temp_keys = set(["key", "etag", "group_id", "updated"])
        # determine which processor to use for the parsed content
        self.fmt = re.compile(r"(?<=format=)\w+")
        self.content = re.compile(r"(?<=content=)\w+")
        self.processors = {

def __init__(self, library_id=None, library_type=None, api_key=None,
                 preserve_json_order=False):
        """ Store Zotero credentials
        """
        self.endpoint = 'https://api.zotero.org'
        if library_id and library_type:
            self.library_id = library_id
            # library_type determines whether query begins w. /users or /groups
            self.library_type = library_type + 's'
        else:
            raise ze.MissingCredentials(
                'Please provide both the library ID and the library type')
        # api_key is not required for public individual or group libraries
        if api_key:
            self.api_key = api_key
        self.preserve_json_order = preserve_json_order
        self.url_params = None
        self.tag_data = False
        self.request = None
        # these aren't valid item fields, so never send them to the server
        self.temp_keys = set(['key', 'etag', 'group_id', 'updated'])
        # determine which processor to use for the parsed content
        self.fmt = re.compile(r'(?<=format=)\w+')
        self.content = re.compile(r'(?<=content=)\w+')
        self.processors = {
            'bib': self._bib_processor,
            'citation': self._citation_processor,