LDAP auth from Docker help - Bad search filter

[nondeterminischtick]

Suspect my env variable is wrong.

On attempting to log in using LDAP (Active Directory) the error is encountered:
ldap_search(): Search: Bad search filter

Bookstack has been deployed with solidnerd/docker-bookstack with the following env variables for LDAP:

AUTH_METHOD=ldap
LDAP_SERVER=ldap://ad.example.com:389
LDAP_BASE_DN=DC=example,DC=com
LDAP_DN=MyDN
LDAP_PASS=MyPass
LDAP_USER_FILTER="(&(sAMAccountName=\${user}))"
LDAP_VERSION=3

I suspect some issue with my ${user} syntax as that is what I had been struggling with up to this point.

The (&(sAMAccountName=\rcutts)) in the screenshot is where I have assumed my issue is but I am unsure how to get the ${user} to work inside docker.

I added the slash after reading this: solidnerd/docker-bookstack@6222693

I had previously tried double $ signs after reading this: #414

Which did not error but showed the invalid credentials message on the login screen.

Does anyone know what the syntax should be for this?

[nondeterminischtick]

For the moment I am assuming that
LDAP_USER_FILTER=(&(sAMAccountName=$${user}))
is correct since it does not cause an exception.

Assuming for now the failure to login is some other boneheaded mistake on my part.

[nondeterminischtick]

Think I've lost my marbles.

Changed to this and it is working:
LDAP_USER_FILTER=(&(sAMAccountName=${user}))

No idea why I was having trouble earlier. Maybe it was in quotes.