raise ExtractorError('Unable to log in')
-class AluraCourseIE(AluraIE):
+class AluraCourseIE(AluraIE): # XXX: Do not subclass from concrete IE
_VALID_URL = r'https?://(?:cursos\.)?alura\.com\.br/course/(?P<id>[^/]+)'
_LOGIN_URL = 'https://cursos.alura.com.br/loginForm?urlAfterLogin=/loginForm'