Using multiple files for developing a robust FileMaker solution can be pretty normal when you plan out the distribution of your data and servers. Some solutions benefit from breaking out part of the solution into one or more separate files.
So, whether taking the load off a given server or simply planning for quicker data access across multiple time zones, one of the bigger problems which pops up with your standard FileMaker accounts is password management. This is where it becomes much easier to use external authentication.
In earlier days, we only had access to Active/Open Directory or system accounts hosted on the same machine as FileMaker server. But, since FileMaker Server 16, we now have the ability to use external authentication through Oauth. This means we can use a third party like Amazon, Google or Microsoft in order to allow users to access solutions and manage their own passwords.
If you're looking for an easier way to manage the users of your solution, then you'll find out how it works and how to make it happen within this video about Oauth External Authentication.
Click the title or link to this article to view the video.