User account information can be changed by 

• the user
• a user with an account administrator role.

If you are an account administrator:

1. Click on the profile icon in the lower-right corner of the page.
2. Go to the Profile settings.
3. Open the Users section.
4. Click on the three-point sign next to the user.
5. Select Edit.
   
   In the pop-up window, you can change your (the user with the Administrator role) username, Role, and Language. As for the other users, in their settings, you can change only Role. 

If you are a user:

1. 1. Click on the profile icon in the lower-right corner of the page.
   2. Go to the Profile settings.
   3. Change your account details on the General tab.