Module credentials 

Credential management for quantum cloud providers.

Abstracts credential storage behind a trait so the same code works with environment variables, files, or future vault integrations.

Structs

CompositeCredentialProvider

Tries multiple CredentialProviders in order until one succeeds.

EnvVarCredentialProvider

Reads credentials from environment variables.

FileCredentialProvider

Reads credentials from a JSON file (e.g. ~/.quantrs/credentials.json).

SecretString

A secret string that zeroes its memory on drop to reduce secret leakage.

Enums

CredentialError

Error type for credential operations

Traits

CredentialProvider

Abstraction for credential storage backends