serverpack: Refactor multiauth sso cookie on validate principal

src/ServerPack/src/MultiAuth.fs

@@ -249,10 +249,11 @@ let ssoCookieOptions (settings: MultiAuthSettings) (o: CookieAuthenticationOptio
     o.ExpireTimeSpan <- TimeSpan.FromHours settings.sso.ttl
     o.Events.OnValidatePrincipal <-
         fun ctx ->
-            if ctx.Principal.HasClaim(fun x -> x.Type = "impersonating") then
-                Task.FromResult ()
-            else
-                updatePrincipalContext settings.oidc ctx
+            task {
+                let isImpersonating = ctx.Principal.HasClaim(fun x -> x.Type = "impersonating")
+                if not isImpersonating then
+                    do! updatePrincipalContext settings.oidc ctx
+            }
 
 let oidOptions (settings: MultiAuthSettings) (o: OpenIdConnectOptions) =
     o.Authority <- settings.oidc.issuer