@bbockelm -- thanks and yep, I've been working from that document.

I think I'm in your third case, the mapfile:

I want to map users to a small set of unix usernames, e.g. one for GlueX, one for EIC, and so on. Because the subject (in my case) looks like http://cilogon.org/serverA/users/xxxxxxx I can't use the subject as a username.

my scitokens.cfg looks like this:

Global]
onmissing = deny
[Issuer jlab]
audience = ANY
issuer = https://cilogon.org/jlab
name_mapfile = /etc/xrootd/scitokens-map.json
map_subject = false
base_path = /

my mapfile looks like this:

[ { "sub": "http://cilogon.org/serverA/users/XXXXXX", "result": "bhess" } ]

this leads to the following. (The "Request username bhess" log message is encouraging, but XRootD still tries to use the subject as the username)

221207 10:49:14 3394610 scitokens_Access: Trying token-based access control
221207 10:49:14 3394610 scitokens_Access: Token not found in recent cache; parsing.
221207 10:49:14 3394610 scitokens_Access: New valid token mapped_username=, subject=http://cilogon.org/serverA/users/XXXXXXX, issuer=https://cilogon.org/jlab, authorizations=/gluex:read,dir,stat,create,mkdir,mv,insert,update,chmod,del
221207 10:49:14 3394610 scitokens_Access: Grant authorization based on scopes for operation=stat, path=/gluex/bbb
221207 10:49:14 3394610 scitokens_Access: Request username bhess
221207 10:49:14 3394610 scitokens_Access: Trying token-based access control
221207 10:49:14 3394610 scitokens_Access: Cached token mapped_username=, subject=http://cilogon.org/serverA/users/X, issuerXXXXXX=https://cilogon.org/jlab, authorizations=/gluex:read,dir,stat,create,mkdir,mv,insert,update,chmod,del
221207 10:49:14 3394610 scitokens_Access: Grant authorization based on scopes for operation=create, path=/gluex/bbb
221207 10:49:14 3394610 scitokens_Access: Request username bhess

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