Improving user management and auto-refreshing user firms

gui/rpk-gui/src/interfaces/index.tsx

@@ -0,0 +1,13 @@
+
+export type IFirm = {
+  instance: string,
+  name: string
+}
+
+type User = {
+  id: number,
+  email: string,
+  firms: [IFirm],
+};
+
+export type IUser = User | null;