fn token_credential() -> Arc<dyn TokenCredential> ⓘExpand description
Returns the token credential to use when the blob URL carries no SAS token.
Prefers RefreshingWorkloadIdentityCredential when its environment
variables are present, because the workload identity credential in
azure_identity’s default chain never re-reads the rotated token file.
Otherwise falls back to the default chain, whose remaining credential
types (e.g. managed identity via IMDS) refresh correctly.