tests/api/flights/read: Add authentication tests
tests/api/flights/read: Add authentication tests

Turbo87/skylines,shadowoneau/skylines,RBE-Avionik/skylines,skylines-project/skylines,Harry-R/skylines,Turbo87/skylines,shadowoneau/skylines,Turbo87/skylines,RBE-Avionik/skylines,Turbo87/skylines,skylines-project/skylines,shadowoneau/skylines,Harry-R/skylines,skylines-project/skylines,Harry-R/skylines,RBE-Avionik/skylines,RBE-Avionik/skylines,skylines-project/skylines,Harry-R/skylines,shadowoneau/skylines