Connect to the database and set it as main database

        :param url: path to the database, uses the Sqlalchemy format
        :type url: str

        :example: ``ds.connect("sqlite:///mydb.slqite")``

def connect(self, url: str):
        """Connect to the database and set it as main database

        :param url: path to the database, uses the Sqlalchemy format
        :type url: str

        :example: ``ds.connect("sqlite:///mydb.slqite")``
        """
        try:
            self.db = dataset.connect(url, row_type=stuf)
        except Exception as e:
            self.err(e, "Can not connect to database")
            return
        if self.db is None:
            self.err("Database " + url + " not found")
            return
        self.ok("Db", self.db.url, "connected")