pub fn credential_keylet(
_env: wasm_exec_env_t,
subject_ptr: *const u8,
subject_len: usize,
issuer_ptr: *const u8,
issuer_len: usize,
cred_type_ptr: *const u8,
cred_type_len: usize,
out_buf_ptr: *mut u8,
out_buf_cap: usize,
) -> i32