def login(self, username, *, token=None):
		"""Log in to Google Music.

		Parameters:
			username (str, Optional): Your Google Music username.
				Used for keeping stored OAuth tokens for multiple accounts separate.
			device_id (str, Optional): A mobile device ID or music manager uploader ID.
				Default: MAC address is used.
			token (dict, Optional): An OAuth token compatible with ``requests-oauthlib``.

		Returns:
			bool: ``True`` if successfully authenticated, ``False`` if not.
		"""

		self._username = username
		self._oauth(username, token=token)

		return self.is_authenticated