setting up streaming replication, part 2

I have the replication server set up and the streaming is working.
The latest data show up, as desired.

3 minor issues.

1) I also have the WAL files being copied to a common location from the
primary server with
archive_command = 'copy %p
"\\\\DISKSTATION\\AccessData\\Prod\\WALfiles\\%f"'

It's not clear to me how the replication server finds those files.

I also have the cleanup set to go, but it doesn't seem to be cleaning up
any of the archived files.
archive_cleanup_command = 'pg_archivecleanup
\\\\DISKSTATION\\AccessData\\Prod\\WALfiles %r'

2) I have the connection string set for the replication server to connect,
primary_conninfo = 'host = 192.168.1.112 port = 5433 user =
{pg_rep_user }password = {password}'
But the log file shows
LOG: waiting for WAL to become available at 2/A10000B8
FATAL: could not connect to the primary server: connection to server
at "{IP}", port 5433 failed: fe_sendauth: no password supplied

3) When I run
"C:\Program Files\PostgreSQL\15\bin\pg_ctl.exe" promote -D "C:\Program
Files\PostgreSQL\15\data"
on the backup to promote it to Primary, I get
pg_ctl: could not send promote signal (PID: 3996): Operation not
permitted

Thanks for all the help so far,
Brad.