Return the user's role in login and user blueprints (#133)

app/blueprints/api/v1/user_blueprint.rb

@@ -4,7 +4,7 @@ module Api
   module V1
     class UserBlueprint < ApiBlueprint
       view :minimal do
-        fields :username, :language, :private, :gender, :theme
+        fields :username, :language, :private, :gender, :theme, :role
         field :avatar do |user|
           {
             picture: user.picture,

app/controllers/tokens_controller.rb

@@ -25,7 +25,8 @@ class TokensController < Doorkeeper::TokensController
         ### Or if you want to just append user using 'as_json'
         body[:user] = {
           id: user.id,
-          username: user.username
+          username: user.username,
+          role: user.role
         }
 
       end