Fixed the SPA authentication flow

scripts/compose.cjs

@@ -25,7 +25,7 @@ function composeScript(target, { bootstrap = true } = {}) {
       .map(file => fs.readFileSync(path.join(root, file), "utf8")).join("\n");
     parts.unshift(`const redwoodStyles = ${JSON.stringify(css)};`);
   }
-  const factory = target === "content" ? "createContentApplication" : "createBackgroundApplication";
+  const factory = { content: "createContentApplication", background: "createBackgroundApplication", "spa-page": "createSpaPage" }[target];
   const ending = bootstrap ? `${factory}().start();` : `return ${factory};`;
   const output = `(function () {\n  "use strict";\n${parts.join("\n")}\n${ending}\n})();\n`;
   new vm.Script(output, { filename: `${target}.js` });