tedge connect c8y shows warnings about certificates when connect via basic auth credentials

[reubenmiller]

Describe the bug

When connecting to Cumulocity using Basic Auth (e.g. tedge config set c8y.auth_method basic), the tedge connect c8y prints out unnecessary warnings about failing to change the ownership of the public and private certificate, which is unexpected as a device certificate is not needed when connecting via Basic Auth credentials.

Below shows the tedge connect c8y lines with the two WARN lines which should not be present when using basic auth.

root@tedge:~# tedge connect c8y
Connecting to Cumulocity with config:
        device id: rmi_test1001
        cloud profile: <none>
        cloud host: thin-edge-io.eu-latest.cumulocity.com:8883
        auth method: basic
        credentials path: /etc/tedge/credentials.toml
        bridge: mosquitto
        service manager: systemd
        mosquitto version: 2.0.11
Creating device in Cumulocity cloud... ✓
2025-03-15T09:04:20.14318654Z  WARN tedge::cli::connect::command: Failed to change ownership of /etc/tedge/device-certs/tedge-certificate.pem to mosquitto:mosquitto: The path is not accessible. "/etc/tedge/device-certs/tedge-certificate.pem"
2025-03-15T09:04:20.143328557Z  WARN tedge::cli::connect::command: Failed to change ownership of /etc/tedge/device-certs/tedge-private-key.pem to mosquitto:mosquitto: The path is not accessible. "/etc/tedge/device-certs/tedge-private-key.pem"
Restarting mosquitto... ✓
Waiting for mosquitto to be listening for connections... ✓
Verifying device is connected to cloud... ✓
Enabling tedge-mapper-c8y... ✓
Enabling tedge-agent... ✓

To Reproduce

1. Configure thin-edge.io to use basic auth when connecting to Cumulocity

   sudo tedge config set c8y.auth_method basic
   cat <<EOT > "$(tedge config get c8y.credentials_path)"
   [c8y]
   username = "t12345/device_rmi_test1001"
   password = "<some_password>"
   EOT
   sudo tedge config set device.id rmi_test1001

2. Connect to c8y

   sudo tedge connect c8y

Expected behavior

The following log messages should not be present in the output as it is expected that the certificate files do not exist when using basic auth.

2025-03-15T09:04:20.14318654Z  WARN tedge::cli::connect::command: Failed to change ownership of /etc/tedge/device-certs/tedge-certificate.pem to mosquitto:mosquitto: The path is not accessible. "/etc/tedge/device-certs/tedge-certificate.pem"
2025-03-15T09:04:20.143328557Z  WARN tedge::cli::connect::command: Failed to change ownership of /etc/tedge/device-certs/tedge-private-key.pem to mosquitto:mosquitto: The path is not accessible. "/etc/tedge/device-certs/tedge-private-key.pem"

Screenshots

Environment (please complete the following information):

Property	Value
OS [incl. version]	Debian GNU/Linux 12 (bookworm)
Hardware [incl. revision]	unknown
System-Architecture	Linux tedge 6.8.0-39-generic #39-Ubuntu SMP PREEMPT_DYNAMIC Sat Jul 6 02:50:39 UTC 2024 aarch64 GNU/Linux
thin-edge.io version	tedge 1.4.3~266+gf4ee98b

Additional context