How can i edit username in SourceTree

[Turab Aliyev]

I'm having a hard time editing the username in Credentials. 

[Brant Schroeder]

@Turab Aliyev Welcome to the Atlassian community

You will need to remove the account and add a new one.  

1. Open Accounts: Navigate to Tools > Options and click the Authentication tab.
2. Remove Old Account: Select the old username/account and click Remove.
3. Add New Account: Click Add and enter the new username and password/personal access token.
4. Refresh: Go to a repository and click 'Fetch' to prompt for new credentials if needed.