Quick question about the format of Hydra tokens - would we ever expect to find a colon (

:

) in a token? I'm asking because my organization believes we have a need to cache tokens in a key-value store, and we'd like to use colons as delimiters.

Tokens are basically base64 encoded (no matter which type of token it is), so you can expect it to not contain colon character, since base64 is [A-Za-z0-9+/=]