Flutter/Git — 帮助替换 pubspec.yaml 中的包

如何解决Flutter/Git — 帮助替换 pubspec.yaml 中的包

我正在尝试在 https://github.com/Zchandev/iChan 编译开源应用程序。他在那里给出指示，看起来很简单。

在步骤 Flutter pub get 我收到以下错误：

compile@compile-VirtualBox:~/snap/Flutter/common/Flutter/iChan$ Flutter pub get
Git error. Command: `git clone --mirror git@github.com:FloPMT/Flutter-apns.git /home/compile/snap/Flutter/common/Flutter/.pub-cache/git/cache/Flutter-apns-31bb8f58633cb76118f15fafa15ad338ddc962c1`
stdout:                                                                 
stderr: cloning into bare repository '/home/compile/snap/Flutter/common/Flutter/.pub-cache/git/cache/Flutter-apns-31bb8f58633cb76118f15fafa15ad338ddc962c1'...
Warning: Permanently added the RSA host key for IP address '140.82.112.3' to the list of kNown hosts.
git@github.com: Permission denied (publickey).                          
fatal: Could not read from remote repository.                           
                                                                        
Please make sure you have the correct access rights                     
and the repository exists.                                              
exit code: 128                                                          
pub get Failed (server unavailable) -- attempting retry 1 in 1 second...

我给开发人员发了消息，他说：“该软件包已移至 https://github.com/mwaylabs/flutter-apns，您需要编辑 pubspec.yaml 文件并替换它”

以下是pubspec.yaml的内容：https://pastebin.com/n0dr7sEM

我真的不知道他要我做什么，但我尝试了一些东西，但没有一个奏效。

有人可以帮助我了解要更改的内容吗？