fn signer(env: soroban_sdk::Env) -> soroban_sdk::BytesN<32>
fn __check_auth(
env: soroban_sdk::Env,
signature_payload: soroban_sdk::BytesN<32>,
signatures: soroban_sdk::Vec,
auth_context: soroban_sdk::Vec,
) -> Result<(), AccError>
fn __constructor(env: soroban_sdk::Env, signer: soroban_sdk::BytesN<32>)