[U] Save uuid as well

README.md

@@ -38,10 +38,15 @@ ClientSecret: Paste the "Value" you copied here
 
 You can now run `mc-auth` to login! After logging in, it will create a text file `~/.config/mc-auth/mc-token.txt` containing your minecraft token.
 
-In your start script for minecraft, add this line before the `java` command:
+In your start script for minecraft, add the `--accessToken` argument to the java line used to start minecraft:
 
 ```shell
-export auth_access_token=$(< ~/.config/mc-auth/mc-token.txt)
+export uuid=$(< ~/.config/mc-auth/mc-uuid.txt)
+export auth=$(< ~/.config/mc-auth/mc-token.txt)
+
+java ... net.minecraft.client.main.Main ... \
+    --accessToken ${auth} \
+    --uuid ${uuid}
 ```
 
 #### 3. Start Minecraft!

mc_authn/__init__.py

@@ -174,8 +174,11 @@ def get_mc_token(xsts_token: str, user_hash: str) -> str:
     write(out_path, json_stringify(r, indent=2))
     printc(f'&a> Success! Response saved to {out_path}')
 
+    mc_uuid = config_path / 'mc-uuid.txt'
     mc_token = config_path / 'mc-token.txt'
+    write(mc_uuid, r['username'])
     write(mc_token, r['access_token'])
+    printc(f'&a> Minecraft UUID saved to {mc_uuid}')
     printc(f'&a> Minecraft token saved to {mc_token}')
 
     return r['access_token']