Basic Authorization for Access Tokens

Basic authorization for Access Tokens is enabled by default for GrapeOAuth2 gem. So you can do requests as follows:

token = '7be8a583fa42b6812fad7c619cff93d216c308099d580c2810d4a1bbc8fe8edd'

RestClient.get 'http://localhost:3000/api/v1/me.json', { 
  'Authorization' => "Basic #{Base64.encode64("#{token}:")}"
}

# => "{ "id":25, "email":"user@domain.com", "first_name":"John", "last_name":"Doe"}"