Function export_secrets_bundle_from_store 

pub async fn export_secrets_bundle_from_store(
    database_path: impl AsRef<Path>,
    passphrase: Option<&str>,
) -> Result<Option<(OwnedUserId, SecretsBundle)>, BundleExportError>

Available on crate features e2e-encryption and sqlite only.

Attempt to export a SecretsBundle from a crypto store.

This method can be used to retrieve a SecretsBundle from an existing matrix-sdk-based client in order to import the SecretsBundle in another Client instance.

This can be useful for migration purposes or to allow existing client instances create new ones that will be fully verified.