Use WoofWare.Myriad entirely to generate the REST API (#9)

Co-authored-by: Smaug123 <patrick+github@patrickstevens.co.uk>
Reviewed-on: #9

PureGym/Client.fs

@@ -9,7 +9,11 @@ open RestEase
 /// The PureGym REST API. You probably want to instantiate one of these with `Api.make`.
 [<WoofWare.Myriad.Plugins.HttpClient>]
 [<Header("User-Agent", "PureGym/1523 CFNetwork/1312 Darwin/21.0.0")>]
+[<BaseAddress "https://capi.puregym.com/api/">]
 type IPureGymApi =
+    [<Header "Authorization">]
+    abstract AuthHeader : string
+
     /// Get the complete list of all gyms known to PureGym.
     [<Get "v1/gyms/">]
     abstract GetGyms : ?ct : CancellationToken -> Task<Gym list>