How to take care of the mongod.conf file?

first start the service with authorization enabled then I created a new user, forgot the password and could not enter so I modified mongod.conf and in the authorization line I put disabled, and you can enter without problem, my question if mongodb allows a file of configuration allow access because it does not have some security I mean the mongod.conf file?

Or could I create another file mongod.conf and have as path another database created by another configuration file for example mongod2.conf?

thank you very much for your reply