Fix CredentialUnavailableError

✅ Solution

CredentialUnavailableError in azure-monitor usually means the application can't find or access the specified Azure credentials due to incorrect configurations or missing environment variables. Ensure the correct Azure Identity credentials (e.g., Managed Identity, Service Principal) are configured and properly accessible in your environment, and explicitly set authentication details like tenantId if necessary via DefaultAzureCredentialOptions. Verify environment variables like AZURE_CLIENT_ID, AZURE_CLIENT_SECRET, and AZURE_TENANT_ID are correctly defined if using a Service Principal.