To change your username:
1. Go to your Profile page (by clicking your profile picture in the top-right corner and selecting Profile from the drop-down menu);
2. Click the pencil icon to the right of your profile picture to enable editing mode.
3. Edit your username and click the blue checkmark to save changes.
To change your email:
1. Go to the Profile settings;
2. Go to the Email preferences page;
3. Enter a new email in the Add E-mail address field, then click Add E-mail button.
If you faced an error "This e-mail address is already associated with another account" please use this instruction to delete the Hyperskill profile you don't need: How can I delete my profile;
4. Click the Re-send Verification button;
5. Check your e-mail and verify your new address via the verification letter.
If you haven't received the verification letter, please contact Support Team;
6. Click Make Primary button on the right side of your new e-mail address;
7. Use the Remove button to delete your old e-mail address.
To change your password:
1. Go to the Profile settings;
2. Go to the Change password page;
3. Enter the new password twice in the Password and Password (again) fields;
4. Press the Set Password button to save your new password.