Fix error in when key pair is incorrect

[dortam888]

• All tests passed. If this feature is not already covered by the tests, I added new tests.
• All static analysis checks passed.
• Appropriate label is added to auto generate release notes.
• I used gofmt for formatting the code before submitting the pull request.
• PR description is clear and concise, and it includes the proposed solution/fix.

---

When key-alias is incorrect we were giving unclear error regarding the problem:

[🚨Error] server response: 400 Bad Request
{
  "errors": [
    {
      "message": "not found"
    }
  ]
}

Fix the error to be more clear.