use user provided git author details

.env.example

@@ -4,4 +4,7 @@ mongoURI=mongodb://localhost:27017
 databases=db_name_1, db_name_2, ...
 # Github repository ssh link
 github=git@github:Username/MongoDB_Backup_Repo.git
-
+# Github Username for git commit --author
+github_author=Github_Username
+# Github email for git commit --author
+github_email=john_does@example.com