Is there a way to change your username without logging into Twitter?

No, as of my last update, Twitter requires users to be logged into their accounts in order to change their username. This process ensures that only the account owner or authorized user can make changes to the account details. Here's how you typically change your username on Twitter:

1. **Log into Your Account**: Visit twitter.com and log in with your username (or email address) and password.

2. **Access Account Settings**: Once logged in, click on your profile picture at the top right corner of the screen to open a dropdown menu. Select "Settings and privacy" from the menu.

3. **Edit Username**: In the Account section, you'll find options to edit your username. Enter your new desired username and click "Save changes".

If you have forgotten your password or are unable to log into your account, Twitter provides steps to recover your account through their password reset process. Without access to your account, changing your username is not possible as it's a security measure to prevent unauthorized changes.

Always ensure you have access to your account credentials and follow Twitter's guidelines for account security to maintain control over your username and account settings.