TypeError: Cannot read property 'oauthType' of undefined

[aribs]

Hi, i found this problem when configure custom oauth to Wordpres
$authProvider.oauth2({
name: 'KOAPP',
url: 'http://subdomain.domain.com',
clientId: 'tiihbdfgsdgssw',
redirectUri: 'http://localhost:9001/#/wpaccountpro-XZ',
authorizationEndpoint: 'http://subdomain.domain.com/wp-json/oauth2/authorize',
oauthType: '2.0'
});

Thanks