External (REMOTE_USER) Authentication

Is there a way to have pgAdmin 4 (the web version) use external, e.g.
Apache-provided, authentication? We have the authentication already
under control in Apache using mod_auth_tkt (so importantly, we are NOT
using LDAP or Kerberos). I simply want pgAdmin 4 to look at the
REMOTE_USER environment variable for the username (and I suppose, create
that user if it does not exist).

Alternatively, is there a way to make pgAdmin 4 use a fixed user /
disable authentication entirely. Since the authentication is being
provided by the web server, the pgAdmin code will not be executed
unless/until the user has authenticated. I do not actually need multiple
users from a pgAdmin perspective, as I'm just trying to administer
"localhost".

--
Richard