Ssh Key authentication failing

[rsoorajs]

When i try to deploy my app via github repo ,using ssh key i got the below error.i almost tried everything.but nothing seems like works..
i put public ssh key on github and put private key on caprover,that didnt worked.i also tried public key on caprover too..both didnt worked.can you say where i am wrong ?

------------------------- Wed Oct 21 2020 03:12:23 GMT+0000 (Coordinated Universal Time)
Build started for heroku
Build has failed!
----------------------
Deploy failed!
Error: Cloning into '/captain/temp/image_raw/heroku/20/source_files'...
Permission denied (publickey).
fatal: Could not read from remote repository.
Please make sure you have the correct access rights
and the repository exists.

[githubsaturn]

The error is self explanatory. Your access is denied. Most likely your private and public keys have problem, please follow the steps here: #464

[rsoorajs]

The error is self explanatory. Your access is denied. Most likely your private and public keys have problem, please follow the steps here: #464

got it.Thank you