Add-on Permissions and Database for Log-In System

Dear Community,

I'm looking forward to have the following Resource/Add-On:

1. I can write a software like a "Log-In Desktop System" with name and password.
1.1 This name and password checks if the user exist in my xenforo board (data base) and checks with which current permissions, like: "Vip, customer, Jesus etc.."

2. I want that the database will be sync to an other server 1x full database sync and every 30minutes a delta sync (what changed).
2.1 The database should be extended with different fields.

Are there possibilities to get that?
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