FIX - Redshift converter (#26229)

(cherry picked from commit ce8e1e5)

Author: pmbrull

openmetadata-service/src/main/java/org/openmetadata/service/secrets/converter/RedshiftConnectionClassConverter.java

@@ -16,15 +16,17 @@
 import java.util.List;
 import org.openmetadata.schema.security.ssl.ValidateSSLClientConfig;
 import org.openmetadata.schema.services.connections.database.RedshiftConnection;
+import org.openmetadata.schema.services.connections.database.common.IamAuthConfig;
+import org.openmetadata.schema.services.connections.database.common.basicAuth;
 import org.openmetadata.schema.utils.JsonUtils;
 
-/**
- * Converter class to get an `DatalakeConnection` object.
- */
 public class RedshiftConnectionClassConverter extends ClassConverter {
 
   private static final List<Class<?>> SSL_SOURCE_CLASS = List.of(ValidateSSLClientConfig.class);
 
+  private static final List<Class<?>> AUTH_SOURCE_CLASSES =
+      List.of(basicAuth.class, IamAuthConfig.class);
+
   public RedshiftConnectionClassConverter() {
     super(RedshiftConnection.class);
   }
@@ -33,6 +35,10 @@ public RedshiftConnectionClassConverter() {
   public Object convert(Object object) {
     RedshiftConnection redshiftConnection =
         (RedshiftConnection) JsonUtils.convertValue(object, this.clazz);
+
+    tryToConvert(redshiftConnection.getAuthType(), AUTH_SOURCE_CLASSES)
+        .ifPresent(redshiftConnection::setAuthType);
+
     tryToConvert(redshiftConnection.getSslConfig(), SSL_SOURCE_CLASS)
         .ifPresent(redshiftConnection::setSslConfig);