Is there a way for me to log in to my actual minecraft account when developing?

[nad2040]

I'm using IntelliJ and when I run the Minecraft Client configuration, how do I make it so that I can use my real MC account instead of having a random Player___ account. I heard you could use --username and --password, but I tried it and it says Completely ignored arguments: [--password, ********]

Running mc 1.17.1

[warjort]

Minecraft itself doesn't use a password, it uses an access token.
The password is used by the launcher to create the token.

You can replicate what the launcher does:
https://wiki.vg/Authentication

Then the parameters are:
--username
--accessToken
--uuid
--userType

The userType is either legacy or mojang depending upon what account you have.

[nad2040]

Thanks. I probably will just use the Player___ account then.

[nok-ko]

I recommend putting a mod like Auth Me in your dev environment instead of messing with command-line variables. IIRC that can leak sensitive info into logs if you're not careful. (Could be very wrong though!)

[xdx505]

I have found the solution. Maybe it can be helpful for anybody.

1. Install MultiMC launcher and log in into your account in it.
2. Then go to MultiMC installation folder and find acounts.json file
3. You'll find your valid token in this part. Save it for future:

"ygg": {
   "token": "your_token"
}

4. Do HTTP GET request to https://api.minecraftservices.com/minecraft/profile (More info) with Bearer header with your token. For example, via Postman, like this:

5. Save your id from first field

6. Edit your IDEA run configuration "Minecraft Client". Paste in "Program arguments" this:
   --username <YOUR_USERNAME> --uuid <YOUR_ID_FROM_STEP_5> --accessToken <YOUR_TOKEN_FROM_STEP_1> --userType msa

7. Success!

[cputnam-a11y]

Dev auth is also a solution