Provides security token decoding services. Configuration is via containers.js. Each container should specify (or inherit) securityTokenKeyFile: path to file containing a key to use for verifying tokens. signedFetchDomain: oauth_consumer_key value to use for signed fetch using default key. Creating a key is best done with a command line like this:
dd if=/dev/random bs=32 count=1 | openssl base64 > /tmp/key.txt
Wire format is "<container>:<encrypted-and-signed-token>"
@since 2.0.0