fix: split code to files + corrected usage of loginCallback

src/auth/openWebPage.ts

@@ -0,0 +1,21 @@
+interface windowFeatures {
+  width: number
+  height: number
+}
+
+export function openWebPage(
+  url: string,
+  windowName: string = '',
+  { width, height }: windowFeatures
+): Window | null {
+  const left = screen.width / 2 - width / 2
+  const top = screen.height / 2 - height / 2
+
+  const loginPopup = window.open(
+    url,
+    windowName,
+    `toolbar=0,location=0,menubar=0,width=${width},height=${height},left=${left},top=${top}`
+  )
+
+  return loginPopup
+}