Possible null reference argument for parameter 'uriString' in 'Uri.Uri(string uriString)'.

Non-nullable property 'RedirectUrl' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Public method 'UpdateRegisteredSystemReturns200Ok' on test class 'SystemRegisterTests' should be marked as a Fact. Reduce the visibility of the method, or add a Fact attribute to the method. (https://xunit.net/xunit.analyzers/rules/xUnit1013)

Public method 'ApproveSystemUserRequest' on test class 'SystemUserTests' should be marked as a Fact. Reduce the visibility of the method, or add a Fact attribute to the method. (https://xunit.net/xunit.analyzers/rules/xUnit1013)

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Non-nullable field 'Authority' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the field as nullable.

Non-nullable property 'ID' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.