I use BitBucket and had to change my password because it was compromised.
git pull
remote: Invalid username or password. If
This answer is for SO users who browse here after searching for the error.
In my case, nothing worked because I changed my username in Bitbucket.
Atlassian and Bitbucket are not completely integrated. Bitbucket uses the Atlassian user email and web app password, but allows you to have a different username.
There seems to be a bug in this process, especially since it's not clear which application or process is generating the authentication and where it's stored or editable. Changing the username breaks authentication.
There may be a way to update the username used by the credentials and Bitbucket, but I was already several hours behind when I discovered that changing my username back to what it was before restored authentication.
I needed to do this and run a git pull in order to set my password from the command line in order to get this working.
Note this method saves your password in a plain text file on your disk:
git config --global credential.helper store
git pull
Other solutions here: Is there a way to skip password typing when using https:// on GitHub?
Sometimes it happens when you change the remote bitbucket account password.
Solution
Go to Control panel => User Accounts => Credential Manager => Windows Credentials => move to Generic credentials and change the password of account
If you found authentication error problem when you entered correct password and username it's git problem. To solves this problem when you are installing the git in your machine uncheck the enable git credential manager
You can update your Bitbucket credentials from the OSX Keychain.
Updating your cached credentials via the command line:
$ git credential-osxkeychain erase
host=bitbucket.org
protocol=https
[press return]
If it's successful, nothing will print out. To test that it works, try and clone a repository from Bitbucket. If you are prompted for a password, the keychain entry was deleted.