Add new code for commands not allowed with auth disabled (#405)

Added in neo-technology/neo4j#33717

---------

Co-authored-by: Reneta Popova <[email protected]>

Author: Hunterness

modules/ROOT/content-nav.adoc

@@ -431,6 +431,7 @@
 **** xref:errors/gql-errors/51N27.adoc[]
 **** xref:errors/gql-errors/51N28.adoc[]
 **** xref:errors/gql-errors/51N29.adoc[]
+**** xref:errors/gql-errors/51N2A.adoc[]
 **** xref:errors/gql-errors/51N30.adoc[]
 **** xref:errors/gql-errors/51N31.adoc[]
 **** xref:errors/gql-errors/51N32.adoc[]

modules/ROOT/pages/errors/gql-errors/51N2A.adoc

@@ -0,0 +1,37 @@
+:page-role: new-2025.11
+= 51N2A
+
+== Status description
+error: system configuration or operation exception - not supported with auth disabled. The command `{ <<cmd>> }` is not available with auth disabled.
+
+== Explanation
+This error occurs when auth is disabled and a user attempts to run a command that is not available unless auth is enabled.
+
+== Example scenario
+For example, try to change the current user's password when auth is disabled:
+
+[source,cypher]
+----
+ALTER CURRENT USER SET PASSWORD FROM $oldPassword TO $newPassword
+----
+
+You will receive the following error:
+
+[source]
+----
+error: system configuration or operation exception - not supported with auth disabled. The command 'ALTER CURRENT USER SET PASSWORD' is not available with auth disabled.
+----
+
+To fix this, either enable auth or change the password using the `ALTER USER` command:
+
+[source,cypher]
+----
+ALTER USER $currentUsername SET PASSWORD $newPassword CHANGE NOT REQUIRED
+----
+
+ifndef::backend-pdf[]
+[discrete.glossary]
+== Glossary
+
+include::partial$glossary.adoc[]
+endif::[]

modules/ROOT/pages/errors/gql-errors/index.adoc

@@ -1772,6 +1772,11 @@ Status description:: error: system configuration or operation exception - not su
 
 Status description:: error: system configuration or operation exception - not supported by this server. The command `{ <<cmd>> }` must be executed on the current `LEADER` server.
 
+[role=label--new-2025.11]
+=== xref:errors/gql-errors/51N2A.adoc[51N2A]
+
+Status description:: error: system configuration or operation exception - not supported with auth disabled. The command `{ <<cmd>> }` is not available with auth disabled.
+
 === xref:errors/gql-errors/51N30.adoc[51N30]
 
 Status description:: error: system configuration or operation exception - not supported with this configuration. `{ <<item>> }` is not supported in `{ <<context>> }`.