fix: use variable for backup script postgres user

Author: RouxAntoine

controllers/spec/template/yaml/BaseConfigMapTemplate.yaml

@@ -122,7 +122,7 @@ data:
     echo "$dt - Starting DB backup of Kubegres resource $KUBEGRES_RESOURCE_NAME into file: $backUpFilePath";
     echo "$dt - Running: pg_dumpall -h $BACKUP_SOURCE_DB_HOST_NAME -U postgres -c | gzip > $backUpFilePath"
 
-    pg_dumpall -h $BACKUP_SOURCE_DB_HOST_NAME -U postgres -c | gzip > $backUpFilePath
+    pg_dumpall -h $BACKUP_SOURCE_DB_HOST_NAME -U $POSTGRES_USER -c | gzip > $backUpFilePath
 
     if [ $? -ne 0 ]; then
       rm $backUpFilePath

controllers/spec/template/yaml/Templates.go

@@ -189,7 +189,7 @@ data:
     echo "$dt - Starting DB backup of Kubegres resource $KUBEGRES_RESOURCE_NAME into file: $backUpFilePath";
     echo "$dt - Running: pg_dumpall -h $BACKUP_SOURCE_DB_HOST_NAME -U postgres -c | gzip > $backUpFilePath"
 
-    pg_dumpall -h $BACKUP_SOURCE_DB_HOST_NAME -U postgres -c | gzip > $backUpFilePath
+    pg_dumpall -h $BACKUP_SOURCE_DB_HOST_NAME -U $POSTGRES_USER -c | gzip > $backUpFilePath
 
     if [ $? -ne 0 ]; then
       rm $backUpFilePath