Finished with crash requests

Change Log to Count
Added option to get user count
Moved functions to VerifyHeader
Added user delete

internal/darkstorm_backend/app.go

@@ -5,7 +5,7 @@ import "net/http"
 // An application interface. Both LogTable and CrashTable are optional, if they return nil then requests will be forbidden.
 type App interface {
 	AppID() string
-	LogTable() LogTable
+	CountTable() CountTable
 	CrashTable() CrashTable
 }