const inputEmail="[email protected]";
const outputStr=await get_SHA256_WebsafeBase64(inputEmail);
/*-++-++++=-++---+-=-++++---=-++++--+=-++++-+-=--+-+++-=-++---++=-++-++++=-++-++-+*/
async function get_SHA256_WebsafeBase64(str) {
  const encoder = new TextEncoder();
  const data = encoder.encode(str);
  const hashBuffer = await crypto.subtle.digest('SHA-256', data);
  const hashArray = Array.from(new Uint8Array(hashBuffer));
  const hashHex = hashArray.map((b) => b.toString(16).padStart(2, '0')).join('');
  const hashBase64 = btoa(String.fromCharCode(...hashArray));
  const websafeBase64 = hashBase64.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
  console.log('result:',websafeBase64)
  return websafeBase64;
}