move LdapBackend to new submodule

src/auth/backends/ldap_backend.rs

@@ -5,19 +5,9 @@ use secrecy::ExposeSecret;
 use tokio::{sync::Mutex, time::sleep};
 use tracing::{event, instrument, Level};
 
-use crate::{config::LdapBackendConfig, secrets::Password};
+use crate::{auth::AuthenticationError, config::LdapBackendConfig, secrets::Password};
 
-use super::AuthenticationError;
-
-pub trait ValidateLogin {
-    /// Validates that the given username and password combination is correct, and returns the
-    /// (normalized) user ID.
-    async fn validate_login(
-        &self,
-        username: &str,
-        password: &Password,
-    ) -> Result<String, AuthenticationError>;
-}
+use super::ValidateLogin;
 
 #[instrument]
 async fn start_ldap_connection(

src/auth/backends/mod.rs

@@ -0,0 +1,13 @@
+use crate::{auth::AuthenticationError, secrets::Password};
+
+pub mod ldap_backend;
+
+pub trait ValidateLogin {
+    /// Validates that the given username and password combination is correct, and returns the
+    /// (normalized) user ID.
+    async fn validate_login(
+        &self,
+        username: &str,
+        password: &Password,
+    ) -> Result<String, AuthenticationError>;
+}

src/auth/mod.rs

@@ -24,7 +24,7 @@ use crate::{
     },
 };
 
-use self::backends::{LdapBackend, ValidateLogin};
+use self::backends::{ldap_backend::LdapBackend, ValidateLogin};
 
 pub mod backends;