[BestPractice] Define a constant instead of using this literal 'SecurityConfiguration' 4 times.

[github-actions]

Codacy ID: aef21ee39bbc89b7ffef948f2c6a96a5

File: FileProcessor/Bootstrapper/MiddlewareRegistry.cs
Line: 89
Rule: BestPractice (Warning)
Commit: e25d03ccc5380e14e5092bb1c188d6779f1b6dbc

Code Snippet:

                                                       options.Authority = ConfigurationReader.GetValue("SecurityConfiguration", "Authority");