[Apiman-user] base64 encoding of tokens

[Tim Dudgeon]

According to this:
http://www.apiman.io/blog/gateway/security/oauth2/keycloak/authentication/authorization/2015/06/09/keycloak-oauth2.html
the tokens returned by keycloak are base64 encoded, but when I try to 
decode I get an error.

$ curl -X POST 
http://192.168.59.103:8080/auth/realms/myrealm/protocol/openid-connect/token 
-H "Content-Type: application/x-www-form-urlencoded" -d "username=user1" 
-d 'password=secret' -d 'grant_type=password' -d 'client_id=echo' -s | 
jq -r '.access_token' | base64 -D
Invalid character in input stream.

How are the tokens supposed to be decoded?

Tim