虽然前面的回复提供了各种解决方案，但我发现其中最简单的一个是将用户名添加到存储库的URL中

git remote add origin https://your-username@github.com/your-username/repository-name.git

如果你已经定义了存储库(没有添加用户名)，你可以按照以下方式更新它:

git remote set-url origin https://your-username@github.com/your-username/respository-name.git

当推送到远程存储库时，git不会从凭据助手中提取任何其他现有存储库的凭据，而是会询问用户/存储库在URL中定义的特定密码。

一般来说，我会不惜一切代价避免使用您的帐户密码，而是使用个人访问令牌。登录github，选择，

Settings > Developer Settings > Personal Access Tokens > Generate new token

只要确保在定义令牌范围时选中repo，并在要求输入密码时输入令牌(而不是您的个人密码)。

I was trying to clone a repo and was facing this issue, I tried removing all git related credentials from windows credentials manager after that while trying to clone git was asking me for my credentials and failing with error invalid username or password. This was happening because the repo I was trying to clone was under an organization on github and that organization had two factor auth enabled and git bash probably do not know how to handle 2fa. So I generated a token from https://github.com/settings/tokens and used the github token instead of password while trying to clone the repo and that worked.

这里的问题是你的本地git无法将更改推送到远程 检查你的遥控器是否设置正确

git remote -v

如果没有正确设置，请尝试将您的遥控器设置为

git remote set-url origin https://username@github.com/MyRepo/project.git

然后尝试使用

git push -u origin master

也有可能你的本地git有不同的凭据，请检查一下。

因为您可能没有首先将远程git存储库标识到您的终端。

git remote set-url origin https://github.com/MyRepo/project.git

然后,

git add .
git commit -m "initial commit"
git push origin master

我尝试了所有的方法，直到我意识到存储库所有者只给了我READ权限，所以Git会抛出“remote: repository not found”。

这可能是身份验证的问题。SourceTree缓存你的github凭据(用于通过https访问存储库)，但从终端你必须使用凭据配置git (https://help.github.com/articles/creating-an-access-token-for-command-line-use/)或使用git+ssh和ssh密钥对(https://help.github.com/articles/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent/)。