diff --git a/src/main/java/dev/kruhlmann/imgfloat/config/SQLiteOAuth2AuthorizedClientService.java b/src/main/java/dev/kruhlmann/imgfloat/config/SQLiteOAuth2AuthorizedClientService.java
index b61bf5a..68feda2 100644
--- a/src/main/java/dev/kruhlmann/imgfloat/config/SQLiteOAuth2AuthorizedClientService.java
+++ b/src/main/java/dev/kruhlmann/imgfloat/config/SQLiteOAuth2AuthorizedClientService.java
@@ -18,6 +18,7 @@ import org.springframework.security.oauth2.core.OAuth2AccessToken;
 import org.springframework.security.oauth2.core.OAuth2RefreshToken;
 
 public class SQLiteOAuth2AuthorizedClientService implements OAuth2AuthorizedClientService {
+    private static final Logger LOG = LoggerFactory.getLogger(SQLiteOAuth2AuthorizedClientService.class);
     private static final String TABLE_NAME = "oauth2_authorized_client";
 
     private final JdbcOperations jdbcOperations;
@@ -72,7 +73,7 @@ public class SQLiteOAuth2AuthorizedClientService implements OAuth2AuthorizedClie
     @Override
     public void saveAuthorizedClient(OAuth2AuthorizedClient authorizedClient, Authentication principal) {
         try {
-            int updated = jdbcOperations.update("""
+            jdbcOperations.update("""
                     INSERT INTO oauth2_authorized_client (
                         client_registration_id, principal_name,
                         access_token_value, access_token_issued_at, access_token_expires_at, access_token_scopes,
@@ -102,7 +103,9 @@ public class SQLiteOAuth2AuthorizedClientService implements OAuth2AuthorizedClie
                         }
                     });
         } catch (DataAccessException ex) {
-            throw ex;
+            LOG.error("Failed to save authorized client for registration ID '{}' and principal '{}'",
+                    authorizedClient.getClientRegistration().getRegistrationId(),
+                    principal.getName(), ex);
         }
     }
 
diff --git a/src/main/java/dev/kruhlmann/imgfloat/config/SchemaMigration.java b/src/main/java/dev/kruhlmann/imgfloat/config/SchemaMigration.java
index f6ff4ab..488a671 100644
--- a/src/main/java/dev/kruhlmann/imgfloat/config/SchemaMigration.java
+++ b/src/main/java/dev/kruhlmann/imgfloat/config/SchemaMigration.java
@@ -79,15 +79,16 @@ public class SchemaMigration implements ApplicationRunner {
             return;
         }
 
-        addColumnIfMissing("assets", columns, "speed", "REAL", "1.0");
-        addColumnIfMissing("assets", columns, "muted", "BOOLEAN", "0");
-        addColumnIfMissing("assets", columns, "media_type", "TEXT", "'application/octet-stream'");
-        addColumnIfMissing("assets", columns, "audio_loop", "BOOLEAN", "0");
-        addColumnIfMissing("assets", columns, "audio_delay_millis", "INTEGER", "0");
-        addColumnIfMissing("assets", columns, "audio_speed", "REAL", "1.0");
-        addColumnIfMissing("assets", columns, "audio_pitch", "REAL", "1.0");
-        addColumnIfMissing("assets", columns, "audio_volume", "REAL", "1.0");
-        addColumnIfMissing("assets", columns, "preview", "TEXT", "NULL");
+        String table = "assets";
+        addColumnIfMissing(table, columns, "speed", "REAL", "1.0");
+        addColumnIfMissing(table, columns, "muted", "BOOLEAN", "0");
+        addColumnIfMissing(table, columns, "media_type", "TEXT", "'application/octet-stream'");
+        addColumnIfMissing(table, columns, "audio_loop", "BOOLEAN", "0");
+        addColumnIfMissing(table, columns, "audio_delay_millis", "INTEGER", "0");
+        addColumnIfMissing(table, columns, "audio_speed", "REAL", "1.0");
+        addColumnIfMissing(table, columns, "audio_pitch", "REAL", "1.0");
+        addColumnIfMissing(table, columns, "audio_volume", "REAL", "1.0");
+        addColumnIfMissing(table, columns, "preview", "TEXT", "NULL");
     }
 
     private void addColumnIfMissing(String tableName, List<String> existingColumns, String columnName, String dataType, String defaultValue) {
diff --git a/src/main/java/dev/kruhlmann/imgfloat/config/SystemEnvironmentValidator.java b/src/main/java/dev/kruhlmann/imgfloat/config/SystemEnvironmentValidator.java
index faf52ab..f8da9b3 100644
--- a/src/main/java/dev/kruhlmann/imgfloat/config/SystemEnvironmentValidator.java
+++ b/src/main/java/dev/kruhlmann/imgfloat/config/SystemEnvironmentValidator.java
@@ -9,8 +9,6 @@ import org.springframework.util.StringUtils;
 import org.springframework.util.unit.DataSize;
 import org.springframework.core.env.Environment;
 
-import java.util.Locale;
-
 @Component
 public class SystemEnvironmentValidator {
     private static final Logger log = LoggerFactory.getLogger(SystemEnvironmentValidator.class);
@@ -61,7 +59,7 @@ public class SystemEnvironmentValidator {
         checkString(assetsPath, "IMGFLOAT_ASSETS_PATH", missing);
         checkString(previewsPath, "IMGFLOAT_PREVIEWS_PATH", missing);
 
-        if (missing.length() > 0) {
+        if (!missing.isEmpty()) {
             throw new IllegalStateException(
                 "Missing or invalid environment variables:\n" + missing
             );