anchor.diff:  + Response 200
   
     [Access Token][]
  +
  +## Authorization Code [/oauth/authorize{?client_id,response_type,redirect_uri}]
  +
  +### Get an authorization code [GET]
  +
  +Client will be redirected to the authorization web page. After picking authorization method and
  +successfully authorizing she will be redirected back to the `redirect_url` with authorization
  +`code`. Authorization code should be exchanged to the access token using `token` endpoint.
  +
  ++ Parameters
  +    + client_id: web (string, required) - Client app identifier.
  +    + response_type: code (string, required) - Response type.
  +    + redirect_uri: https://tvarkaumiesta.lt/auth/callback (string, required) - Redirect uri.
  +
  ++ Response 302
   
   ## VIISP Access Token [/auth/viisp/new{?redirect_uri}]
   
  
positive.code: 
  Pass `guest` value as username/password.
  
  #### Login with email and password
  
  Grant type: `password`
  
negative.code: ```ruby
  require 'oauth2'
  
  client = OAuth2::Client.new('android', nil, site: 'https://tvarkaumiesta.lt/api/oauth')
  token = client.password.get_token('guest', 'guest')
  
  puts token.token
  