How to change my Git username in terminal?

1. In your terminal, navigate to the repo you want to make the changes in.
2. Execute git config --list to check current username & email in your local repo.
3. Change username & email as desired. Make it a global change or specific to the local repo:
   git config [--global] user.name "Full Name"
git config [--global] user.email "[email protected]"
   
   Per repo basis you could also edit .git/config manually instead.
4. Done!

When performing step 2 if you see credential.helper=manager you need to open the credential manager of your computer (Win or Mac) and update the credentials there

Here is how it look on windows

Troubleshooting? Learn more

You probably need to update the remote URL since github puts your username in it. You can take a look at the original URL by typing

git config --get remote.origin.url

Or just go to the repository page on Github and get the new URL. Then use

git remote set-url origin https://{new url with username replaced}

to update the URL with your new username.

there are 3 ways we can fix this issue

method-1 (command line)

To set your account's default identity globally run below commands

git config --global user.email "[email protected]"
git config --global user.name "Your Name"
git config --global user.password "your password"

To set the identity only in current repository , remove --global and run below commands in your Project/Repo root directory

git config user.email "[email protected]"
git config user.name "Your Name"
git config user.password "your password"

Example:

email -> organization email Id
name  -> mostly <employee Id> or <FirstName, LastName> 

**Note: ** you can check these values in your GitHub profile or Bitbucket profile

method-2 (.gitconfig)

create a .gitconfig file in your home folder if it doesn't exist. and paste the following lines in .gitconfig

[user]
    name = FirstName, LastName
    email = [email protected]
    password = abcdxyz
[http]
    sslVerify = false
    proxy = 
[https]
    sslverify = false
    proxy = https://corp\\<uname>:<password>@<proxyhost>:<proxy-port>
[push]
    default = simple
[credential]
    helper = cache --timeout=360000000
[core]
    autocrlf = false

Note: you can remove the proxy lines from the above , if you are not behind the proxy

Home directory to create .gitconfig file:

windows : c/users/< username or empID >

Mac or Linux : run this command to go to home directory cd ~

or simply run the following commands one after the other

git config --global --edit
git commit --amend --reset-author

method-3 (git credential pop up)

windows :

Control Panel >> User Account >> Credential Manager >> Windows Credential >> Generic Credential 
>> look for any github cert/credential and delete it.

then running any git command will prompt to enter new user name and password.

Mac :

command+space >> search for "keychain Access" and click ok >> 
search for any certificate/file with gitHub >> delete it.

then running any git command will prompt to enter new user name and password.

1. EDIT: In addition to changing your name and email You may also need to change your credentials:

• To change locally for just one repository, enter in terminal, from within the repository

  git config credential.username "new_username"
  

• To change globally use

  git config --global credential.username "new_username"
  

  (EDIT EXPLAINED: If you don't change also the user.email and user.name, you will be able to push your changes, but they will be registered in git under the previous user)

2. Next time you push, you will be asked to enter your password

   Password for 'https://<new_username>@github.com':