Try setting minio unset accessKey/secretKey to empty string

.gitlab-ci.yml

@@ -145,7 +145,7 @@ deploy_prod_minio:
     - cp $kubekorner_k3s_config .
     - kubeconfig=$(basename $kubekorner_k3s_config)
     # get password from any previous installation
-    - auth_sec="geosphere-minio-minio"
+    - auth_sec="geosphere-minio"
     - sec_info=$(kubectl --kubeconfig $kubeconfig get secret --namespace $ns $auth_sec || echo "")
     - echo "$sec_info"
     # if we've installed this once then reuse the existing secret
@@ -156,7 +156,7 @@ deploy_prod_minio:
       sk=$(kubectl --kubeconfig $kubeconfig get secret --namespace "$ns" "$auth_sec" -o jsonpath="{.data.secretKey}" | base64 -d);
       EXTRA_ARGS="--set existingSecret=$auth_sec --set accessKey=$ak --set secretKey=$sk";
       else
-      EXTRA_ARGS="--set accessKey=false --set secretKey=false";
+      EXTRA_ARGS='--set accessKey="" --set secretKey=""';
       fi
     - echo $EXTRA_ARGS
     - helm upgrade -v 2 --install --kubeconfig $kubeconfig -f production/values-geosphere-minio.yaml $EXTRA_ARGS --namespace $ns geosphere-minio stable/minio