deploy failed when add github package into shiny

I have write a r package and a shinyapp, it runs on my Rstudio when I click the "Run App", and I register a shinyapp.io account and use Rstudio to connect to it. But when I try to deploy the shinyapp into io. The web page shows error that
" An error has occurred

  The application failed to start (exited with code 1).

    `Error in value[[3L]](cond) : there is no package called ‘my_github_package’
    Calls: local ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
   Execution halted`

"

See the documentation for using your packages in the cloud.

You will need to host your package on GitHub or publish it in order to be able to use it on shinyapps.io

I've run into instances of this as well. When deploying, make sure to have your GitHub package installed from GitHub (devtools::install_github()), not installed from a local folder (devtools::install()).

When installed from GitHub, devtools will store the GitHub location and hash for shinyapps to download. (If installed from a local folder, there is no location to download from.)

I tried that, also don't work, then I notice that when click the publish button, there are options what files to deploy,
only deploy the shiny.R instead of whole package, then it works! So I guess install from github and only deploy the shiny.R, both two steps need to be done.Thanks!

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