Issues with public keys (Access denied)

Hello,

Looks like public key is not properly authenticating the travis build, please help to resolve this issue -

Warning: Permanently added the RSA host key for IP address ‘140.82.113.3’ to the list of known hosts.

492Permission denied (publickey).

493fatal: Could not read from remote repository.

494

495Please make sure you have the correct access rights

496and the repository exists.

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