Simple node.js script fails getSession(), insert()

async function doit() {
  const supabase = await createClient(my_supa_host, my_anon_key);
  const sign_in_data = await supabase.auth.signInWithPassword({
    email, password
  });
  console.log('sign in data:');
  console.log(sign_in_data);

  const sess_data = await supabase.auth.getSession();
  console.log('sess data:');
  console.log(sess_data);

  const insert_resp = await supabase
    .from('txns_eth')
    .insert({blockNum: '1234', hash: 'asdf'});

  console.log('insert response:');
  console.log(insert_resp);
  console.log('Done.');
}

doit();

sign in data:
{
  data: {
    session: {
      access_token: 'REDACTED',
      token_type: 'bearer',
      expires_in: 86400,
      refresh_token: 'REDACTED',
      user: [Object],
      expires_at: 1670435411
    },
    user: {
      id: 'REDACTED',
      aud: 'authenticated',
      role: 'authenticated',
      email: 'REDACTED@yahoo.com',
      email_confirmed_at: '2022-12-06T03:30:19.466461Z',
      phone: '',
      confirmation_sent_at: '2022-12-06T03:29:58.480631Z',
      confirmed_at: '2022-12-06T03:30:19.466461Z',
      last_sign_in_at: '2022-12-06T17:50:11.113006993Z',
      app_metadata: [Object],
      user_metadata: {},
      identities: [Array],
      created_at: '2022-12-06T03:29:58.476374Z',
      updated_at: '2022-12-06T17:50:11.114704Z'
    }
  },
  error: null
}
sess data:
{ data: { session: null }, error: null }
insert response:
{
  error: {
    code: '42501',
    details: null,
    hint: null,
    message: 'new row violates row-level security policy for table "txns_eth"'
  },
  data: null,
  count: null,
  status: 401,
  statusText: 'Unauthorized'
}
Done.