Pluggable, restart-safe credential persistence.
The default implementation is a crash-safe file store (createFileCredentialStore); embedded targets can supply their own backend (flash/NVS, secure element, keychain) by implementing this contract.
Remove any persisted credential.
Load the persisted credential, or null when none exists yet.
null
Persist the credential atomically (durable across power loss).
Pluggable, restart-safe credential persistence.
The default implementation is a crash-safe file store (createFileCredentialStore); embedded targets can supply their own backend (flash/NVS, secure element, keychain) by implementing this contract.