diff --git a/src-tauri/Cargo.lock b/src-tauri/Cargo.lock
index f5a8bd4a..73198816 100644
--- a/src-tauri/Cargo.lock
+++ b/src-tauri/Cargo.lock
@@ -962,6 +962,7 @@ dependencies = [
 name = "epherome-beta"
 version = "0.0.0"
 dependencies = [
+ "once_cell",
  "serde",
  "serde_json",
  "tauri",
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index fad0c0e4..f04c03f7 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -18,6 +18,7 @@ tauri = { version = "1.5", features = [ "api-all",
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 zip = "0.6.6"
+once_cell = "1.19.0"
 
 [features]
 # this feature is used for production builds or when `devPath` points to the filesystem
diff --git a/src-tauri/src/core/auth.rs b/src-tauri/src/core/auth.rs
new file mode 100644
index 00000000..8b58b756
--- /dev/null
+++ b/src-tauri/src/core/auth.rs
@@ -0,0 +1,36 @@
+use tauri::Manager;
+
+#[tauri::command]
+pub fn get_microsoft_auth_code(app_handle: tauri::AppHandle) {
+    tauri::WindowBuilder::new(
+        &app_handle,
+        "oauth",
+        tauri::WindowUrl::External(
+            "https://login.live.com/oauth20_authorize.srf\
+                ?client_id=00000000402b5328\
+                &response_type=code\
+                &prompt=login\
+                &scope=service%3A%3Auser.auth.xboxlive.com%3A%3AMBI_SSL\
+                &redirect_uri=https%3A%2F%2Flogin.live.com%2Foauth20_desktop.srf"
+                .parse()
+                .unwrap(),
+        ),
+    )
+    .title("Log in to Microsoft...")
+    .on_navigation(|url| {
+        let prefix = "https://login.live.com/oauth20_desktop.srf?";
+        let url = url.to_string();
+        if url.starts_with(prefix) {
+            let auth_code = url.replace(prefix, "");
+            if let Some(app_handle) = crate::INSTANCE.get() {
+                app_handle.emit_all("auth-code", auth_code).unwrap();
+                if let Some(window) = app_handle.get_window("oauth") {
+                    window.close().unwrap();
+                }
+            }
+        }
+        true
+    })
+    .build()
+    .unwrap();
+}
diff --git a/src-tauri/src/core/mod.rs b/src-tauri/src/core/mod.rs
index ba556561..6dc8c8aa 100644
--- a/src-tauri/src/core/mod.rs
+++ b/src-tauri/src/core/mod.rs
@@ -1,2 +1,3 @@
+pub mod auth;
 pub mod runner;
 pub mod zip;
diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index fe7fb6ad..8fc82c68 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -1,13 +1,23 @@
 // Prevents additional console window on Windows in release, DO NOT REMOVE!!
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
+use once_cell::sync::OnceCell;
+use tauri::AppHandle;
+
+pub static INSTANCE: OnceCell<AppHandle> = OnceCell::new();
+
 mod core;
 
 fn main() {
     tauri::Builder::default()
+        .setup(|app| {
+            INSTANCE.set(app.handle()).unwrap();
+            Ok(())
+        })
         .invoke_handler(tauri::generate_handler![
             core::zip::extract_zip,
-            core::runner::run_minecraft
+            core::runner::run_minecraft,
+            core::auth::get_microsoft_auth_code,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");